diff --git a/src/osgPlugins/txp/trpage_compat.cpp b/src/osgPlugins/txp/trpage_compat.cpp
index d9d822277..2125eae86 100644
--- a/src/osgPlugins/txp/trpage_compat.cpp
+++ b/src/osgPlugins/txp/trpage_compat.cpp
@@ -50,7 +50,7 @@ bool trpgMatTable1_0::Read(trpgReadBuffer &buf)
 	trpgToken matTok;
 	int32 len;
 	bool status;
-	int i,j,k;
+	unsigned int i,j,k;
 
 	std::vector<trpgShortMaterial> shortTable;
 	std::vector<trpgMaterial> baseMats;
@@ -68,12 +68,12 @@ bool trpgMatTable1_0::Read(trpgReadBuffer &buf)
 		if (matTok == TRPGSHORTMATTABLE) {
 			int32 numTex,texId;
 			buf.PushLimit(len);
-			for (i=0;i<numTable;i++)
-				for (j=0;j<numMat;j++) {
+			for (i=0;i<(unsigned int)numTable;i++)
+				for (j=0;j<(unsigned int)numMat;j++) {
 					trpgShortMaterial &smat = shortTable[i*numMat+j];
 					buf.Get(smat.baseMat);
 					buf.Get(numTex);
-					for (k=0;k<numTex;k++) {
+					for (k=0;k<(unsigned int)numTex;k++) {
 						buf.Get(texId);
 						smat.texids.push_back(texId);
 					}
@@ -85,7 +85,7 @@ bool trpgMatTable1_0::Read(trpgReadBuffer &buf)
 			buf.Get(numBaseMat);
 			if (numBaseMat < 0) throw 1;
 			baseMats.resize(numBaseMat);
-			for (i=0;i<numBaseMat;i++) {
+			for (i=0;i<(unsigned int)numBaseMat;i++) {
 				buf.GetToken(matTok,len);
 				if (matTok != TRPGMATERIAL) throw 1;
 				buf.PushLimit(len);
@@ -154,11 +154,11 @@ bool trpgMatTable1_0::Write(trpgWriteBuffer &buf)
 
     // Write the short materials
     buf.Begin(TRPGSHORTMATTABLE);
-    for (i=0;i<shortMats.size();i++) {
+    for (i=0;i<(int)shortMats.size();i++) {
 	trpgShortMaterial &sMat = shortMats[i];
 	buf.Add(sMat.baseMat);
 	buf.Add((int)(sMat.texids.size()));
-	int j;
+	unsigned int j;
 	for (j=0;j<sMat.texids.size();j++)
 	    buf.Add(sMat.texids[j]);
     }
@@ -228,7 +228,7 @@ bool trpgTexTable1_0::Read(trpgReadBuffer &buf)
 	try {
 		buf.Get(numTex);
 		texList.resize(numTex);
-		for (unsigned int i=0;i<numTex;i++) {
+		for (unsigned int i=0;i<(unsigned int)numTex;i++) {
 			trpgTexture1_0 tex1_0;
 			tex1_0.Read(buf);
 			texList[i] = tex1_0;
@@ -264,7 +264,7 @@ bool trpgTexTable1_0::Write(trpgWriteBuffer &buf)
 
 }
 
-trpgTileTable1_0::trpgTileTable1_0(const trpgTileTable &inTable)
+trpgTileTable1_0::trpgTileTable1_0(const trpgTileTable& /*inTable*/)
 {
     // Nothing to copy for now
 }
diff --git a/src/osgPlugins/txp/trpage_geom.cpp b/src/osgPlugins/txp/trpage_geom.cpp
index 634f62e22..77aebaebf 100644
--- a/src/osgPlugins/txp/trpage_geom.cpp
+++ b/src/osgPlugins/txp/trpage_geom.cpp
@@ -263,7 +263,7 @@ void trpgGeometry::SetTexCoords(int num,BindType bind,const float64 *data)
 }
 void trpgGeometry::AddTexCoord(DataType type,trpg2dPoint &pt, int n)
 {
-	if ((n<0) || (n >= texData.size()))
+	if ((n<0) || (n >= (int)texData.size()))
 		return;
 	trpgTexData *td = &texData[n];
 
@@ -337,7 +337,7 @@ bool trpgGeometry::GetNumMaterial(int &n) const
 bool trpgGeometry::GetMaterial(int id,int32 &m,bool &isLocal) const
 {
 	isLocal = false;
-	if (!isValid() || id < 0 || id >= materials.size()) return false;
+	if (!isValid() || id < 0 || id >= (int)materials.size()) return false;
 	m = materials[id];
 	if (m < 0) {
 	    m = -m - 1;
@@ -356,7 +356,7 @@ bool trpgGeometry::GetNumVertex(int &v) const
 }
 bool trpgGeometry::GetVertices(float32 *v) const
 {
-	int i;
+	unsigned int i;
 
 	if (!isValid()) return false;
 	if (vertDataFloat.size() != 0)
@@ -369,7 +369,7 @@ bool trpgGeometry::GetVertices(float32 *v) const
 }
 bool trpgGeometry::GetVertices(float64 *v) const
 {
-	int i;
+	unsigned int i;
 
 	if (!isValid()) return false;
 	if (vertDataFloat.size() != 0)
@@ -384,7 +384,7 @@ bool trpgGeometry::GetVertex(int n,trpg3dPoint &pt) const
 {
 	int id = 3*n;
 	int idMax = 3*n+2;
-	if (id < 0 || (idMax >= vertDataFloat.size() && idMax >= vertDataDouble.size()))
+	if (id < 0 || (idMax >= (int)vertDataFloat.size() && idMax >= (int)vertDataDouble.size()))
 		return false;
 	if (vertDataFloat.size() > vertDataDouble.size()) {
 		pt.x = vertDataFloat[id];
@@ -409,7 +409,7 @@ bool trpgGeometry::GetNumNormal(int32 &n) const
 }
 bool trpgGeometry::GetNormals(float32 *v) const
 {
-	int i;
+	unsigned int i;
 
 	if (!isValid()) return false;
 	if (normDataFloat.size() != 0)
@@ -422,7 +422,7 @@ bool trpgGeometry::GetNormals(float32 *v) const
 }
 bool trpgGeometry::GetNormals(float64 *v) const
 {
-	int i;
+	unsigned int i;
 
 	if (!isValid()) return false;
 	if (normDataFloat.size() != 0)
@@ -441,7 +441,7 @@ bool trpgGeometry::GetNumColorSets(int &n) const
 }
 bool trpgGeometry::GetColorSet(int id,trpgColorInfo *ci) const
 {
-	if (!isValid() || id < 0 || id >= colors.size()) return false;
+	if (!isValid() || id < 0 || id >= (int)colors.size()) return false;
 	*ci = colors[id];
 	return true;
 }
@@ -453,7 +453,7 @@ bool trpgGeometry::GetNumTexCoordSets(int &n) const
 }
 bool trpgGeometry::GetTexCoordSet(int id,trpgTexData *tx) const
 {
-	if (!isValid() || id < 0 || id >= texData.size()) return false;
+	if (!isValid() || id < 0 || id >= (int)texData.size()) return false;
 	*tx = texData[id];
 	return true;
 }
@@ -466,7 +466,7 @@ bool trpgGeometry::GetNumEdgeFlag(int &n) const
 bool trpgGeometry::GetEdgeFlags(char *e) const
 {
 	if (!isValid()) return false;
-	for (int i=0;i<edgeFlags.size();i++)
+	for (unsigned int i=0;i<edgeFlags.size();i++)
 		e[i] = edgeFlags[i];
 	return true;
 }
@@ -525,7 +525,7 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 		buf.Begin(TRPG_GEOM_VERT32);
 		int32 num = vertDataFloat.size()/3;
 		buf.Add(num);
-		for (i=0;i<3*num;i++)
+		for (i=0;i<(unsigned int)3*num;i++)
 			buf.Add(vertDataFloat[i]);
 		buf.End();
 	}
@@ -533,7 +533,7 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 		buf.Begin(TRPG_GEOM_VERT64);
 		int32 num = vertDataDouble.size()/3;
 		buf.Add(num);
-		for (i=0;i<3*num;i++)
+		for (i=0;i<(unsigned int)3*num;i++)
 			buf.Add(vertDataDouble[i]);
 		buf.End();
 	}
@@ -548,7 +548,7 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 		buf.Add((int32)normBind);
 		int32 num = normDataFloat.size()/3;
 		buf.Add(num);
-		for (i=0;i<3*num;i++)
+		for (i=0;i<(unsigned int)3*num;i++)
 			buf.Add(normDataFloat[i]);
 		buf.End();
 	}
@@ -557,7 +557,7 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 		buf.Add((int32)normBind);
 		int32 num = normDataDouble.size()/3;
 		buf.Add(num);
-		for (i=0;i<3*num;i++)
+		for (i=0;i<(unsigned int)3*num;i++)
 			buf.Add(normDataDouble[i]);
 		buf.End();
 	}
@@ -594,7 +594,7 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 			buf.Add((int32)td.bind);
 			int32 num = td.floatData.size()/2;
 			buf.Add(num);
-			for (j=0;j<num*2;j++)
+			for (j=0;j<(unsigned int)num*2;j++)
 				buf.Add(td.floatData[j]);
 			buf.End();
 		}
@@ -603,12 +603,12 @@ bool trpgGeometry::Write(trpgWriteBuffer &buf)
 			buf.Add((int32)td.bind);
 			int32 num = td.doubleData.size()/2;
 			buf.Add(num);
-			for (j=0;j<num*2;j++)
+			for (j=0;j<(unsigned int)num*2;j++)
 				buf.Add(td.doubleData[j]);
 			buf.End();
 
 			float u;
-			for (j=0;j<num*2;j++)
+			for (j=0;j<(unsigned int)num*2;j++)
 				u = (float)td.doubleData[j];
 		}
 	}
diff --git a/src/osgPlugins/txp/trpage_header.cpp b/src/osgPlugins/txp/trpage_header.cpp
index 444775463..ef2b8aed2 100644
--- a/src/osgPlugins/txp/trpage_header.cpp
+++ b/src/osgPlugins/txp/trpage_header.cpp
@@ -91,7 +91,7 @@ void trpgHeader::SetDbVersion(int32 vmaj,int32 vmin)
 }
 void trpgHeader::SetTileSize(int id,const trpg2dPoint &pt)
 {
-	if (id < 0 || id >= tileSize.size())  return;
+	if (id < 0 || id >= (int)tileSize.size())  return;
 	tileSize[id] = pt;
 }
 void trpgHeader::SetOrigin(const trpg3dPoint &pt)
@@ -212,7 +212,7 @@ bool trpgHeader::GetDbVersion(int32 &vmaj,int32 &vmin) const
 bool trpgHeader::GetTileSize(int id,trpg2dPoint &pt) const
 {
 	if (!isValid()) return false;
-	if (id < 0 || id >= tileSize.size())  return false;
+	if (id < 0 || id >= (int)tileSize.size())  return false;
 	pt = tileSize[id];
 	return true;
 }
diff --git a/src/osgPlugins/txp/trpage_label.cpp b/src/osgPlugins/txp/trpage_label.cpp
index 8bbf35412..f40099a77 100644
--- a/src/osgPlugins/txp/trpage_label.cpp
+++ b/src/osgPlugins/txp/trpage_label.cpp
@@ -231,7 +231,7 @@ void trpgTextStyleTable::Reset()
 
 bool trpgTextStyleTable::isValid() const
 {
-	for (int i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		if (!styles[i].isValid())
 			return false;
 
@@ -246,7 +246,7 @@ int trpgTextStyleTable::AddStyle(const trpgTextStyle &style)
 
 int trpgTextStyleTable::FindAddStyle(const trpgTextStyle &style)
 {
-	for (int i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		if (styles[i] == style)
 			return i;
 
@@ -260,7 +260,7 @@ int trpgTextStyleTable::GetNumStyle() const
 
 const trpgTextStyle *trpgTextStyleTable::GetStyleRef(int id) const
 {
-	if (id < 0 || id >= styles.size())
+	if (id < 0 || id >= (int)styles.size())
 		return NULL;
 
 	return &styles[id];
@@ -268,7 +268,6 @@ const trpgTextStyle *trpgTextStyleTable::GetStyleRef(int id) const
 
 bool trpgTextStyleTable::Write(trpgWriteBuffer &buf)
 {
-	int i;
 	if (!isValid())
 		return false;
 
@@ -279,7 +278,7 @@ bool trpgTextStyleTable::Write(trpgWriteBuffer &buf)
 	buf.Add((int32)numStyle);
 
 	// Write the styles
-	for (i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		styles[i].Write(buf);
 
 	buf.End();
@@ -456,7 +455,7 @@ void trpgSupportStyleTable::Reset()
 
 bool trpgSupportStyleTable::isValid() const
 {
-	for (int i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		if (!styles[i].isValid())
 			return false;
 
@@ -471,7 +470,7 @@ int trpgSupportStyleTable::AddStyle(const trpgSupportStyle &style)
 
 int trpgSupportStyleTable::FindAddStyle(const trpgSupportStyle &style)
 {
-	for (int i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		if (styles[i] == style)
 			return i;
 
@@ -485,7 +484,7 @@ int trpgSupportStyleTable::GetNumStyle() const
 
 const trpgSupportStyle *trpgSupportStyleTable::GetStyleRef(int id) const
 {
-	if (id < 0 || id >= styles.size())
+	if (id < 0 || id >= (int)styles.size())
 		return NULL;
 
 	return &styles[id];
@@ -493,7 +492,6 @@ const trpgSupportStyle *trpgSupportStyleTable::GetStyleRef(int id) const
 
 bool trpgSupportStyleTable::Write(trpgWriteBuffer &buf)
 {
-	int i;
 	if (!isValid())
 		return false;
 
@@ -504,7 +502,7 @@ bool trpgSupportStyleTable::Write(trpgWriteBuffer &buf)
 	buf.Add((int32)numStyle);
 
 	// Write the styles
-	for (i=0;i<styles.size();i++)
+	for (unsigned int i=0;i<styles.size();i++)
 		styles[i].Write(buf);
 
 	buf.End();
@@ -519,7 +517,6 @@ bool trpgSupportStyleTable::Read(trpgReadBuffer &buf)
 	int32 len;
 	bool status;
 	int numStyle;
-	int i;
 
 	Reset();
 
@@ -528,7 +525,7 @@ bool trpgSupportStyleTable::Read(trpgReadBuffer &buf)
 		if (numStyle < 0)
 			throw 1;
 		styles.resize(numStyle);
-		for (i=0;i<numStyle;i++) {
+		for (int i=0;i<numStyle;i++) {
 			buf.GetToken(styleTok,len);
 			if (styleTok != TRPG_SUPPORT_STYLE) throw 1;
 			buf.PushLimit(len);
@@ -694,7 +691,7 @@ void trpgLabelPropertyTable::Reset()
 
 bool trpgLabelPropertyTable::isValid() const
 {
-	for (int i=0;i<properties.size();i++)
+	for (unsigned int i=0;i<properties.size();i++)
 		if (!properties[i].isValid())
 			return false;
 
@@ -709,7 +706,7 @@ int trpgLabelPropertyTable::AddProperty(const trpgLabelProperty &property)
 
 int trpgLabelPropertyTable::FindAddProperty(const trpgLabelProperty& property)
 {
-	for (int i=0;i<properties.size();i++)
+	for (unsigned int i=0;i<properties.size();i++)
 		if (properties[i] == property)
 			return i;
 
@@ -723,7 +720,7 @@ int trpgLabelPropertyTable::GetNumProperty() const
 
 const trpgLabelProperty *trpgLabelPropertyTable::GetPropertyRef(int id) const
 {
-	if (id < 0 || id >= properties.size())
+	if (id < 0 || id >= (int)properties.size())
 		return NULL;
 
 	return &properties[id];
@@ -731,7 +728,6 @@ const trpgLabelProperty *trpgLabelPropertyTable::GetPropertyRef(int id) const
 
 bool trpgLabelPropertyTable::Write(trpgWriteBuffer &buf)
 {
-	int i;
 	if (!isValid())
 		return false;
 
@@ -742,7 +738,7 @@ bool trpgLabelPropertyTable::Write(trpgWriteBuffer &buf)
 	buf.Add((int32)numProperty);
 
 	// Write the properties
-	for (i=0;i<properties.size();i++)
+	for (unsigned int i=0;i<properties.size();i++)
 		properties[i].Write(buf);
 
 	buf.End();
@@ -757,7 +753,6 @@ bool trpgLabelPropertyTable::Read(trpgReadBuffer &buf)
 	int32 len;
 	bool status;
 	int numProperty;
-	int i;
 
 	Reset();
 
@@ -766,7 +761,7 @@ bool trpgLabelPropertyTable::Read(trpgReadBuffer &buf)
 		if (numProperty < 0)
 			throw 1;
 		properties.resize(numProperty);
-		for (i=0;i<numProperty;i++) {
+		for (unsigned int i=0;i<(unsigned int)numProperty;i++) {
 			buf.GetToken(propertyTok,len);
 			if (propertyTok != TRPG_LABEL_PROPERTY) throw 1;
 			buf.PushLimit(len);
@@ -925,8 +920,6 @@ const std::vector<trpg3dPoint> *trpgLabel::GetSupports() const
 
 bool trpgLabel::Write(trpgWriteBuffer &buf)
 {
-	int i;
-
 	buf.Begin(TRPG_LABEL);
 	buf.Add(propertyId);
 	buf.Add(text);
@@ -938,7 +931,7 @@ bool trpgLabel::Write(trpgWriteBuffer &buf)
 	buf.Add(url);
 	buf.Add(location);
 	buf.Add((int)supports.size());
-	for (i=0;i<supports.size();i++)
+	for (unsigned i=0;i<supports.size();i++)
 		buf.Add(supports[i]);
 	buf.End();
 
diff --git a/src/osgPlugins/txp/trpage_light.cpp b/src/osgPlugins/txp/trpage_light.cpp
index 6582164e8..79f613028 100644
--- a/src/osgPlugins/txp/trpage_light.cpp
+++ b/src/osgPlugins/txp/trpage_light.cpp
@@ -43,7 +43,8 @@ trpgLightAttr::trpgLightAttr(void)
 	Reset();
 }
 
-trpgLightAttr::trpgLightAttr(const trpgLightAttr &in)
+trpgLightAttr::trpgLightAttr(const trpgLightAttr& in):
+	trpgReadWriteable(in)
 {
 	data.commentStr = NULL;
 	operator=(in);
@@ -735,7 +736,8 @@ trpgLight::trpgLight(void)
 	index = -1;
 }
 
-trpgLight::trpgLight(const trpgLight &in)
+trpgLight::trpgLight(const trpgLight &in):
+	trpgReadWriteable(in)
 {
 	operator=(in);
 }
@@ -776,12 +778,10 @@ bool trpgLight::GetVertex(uint32 ix, trpg3dPoint &pt) const
 
 bool trpgLight::GetVertices(trpg3dPoint *pts) const
 {
-	int i;
-
 	if (!isValid()) return false;
 
 	if (lightPoints.size() != 0)
-		for (i=0;i<lightPoints.size();i++)
+		for (unsigned int i=0;i<lightPoints.size();i++)
 			pts[i] = lightPoints[i];
 
 	return true;
@@ -789,13 +789,12 @@ bool trpgLight::GetVertices(trpg3dPoint *pts) const
 
 bool trpgLight::GetVertices(float64 *fts) const
 {
-	int i;
-	int j = 0;
+	unsigned int j = 0;
 
 	if (!isValid()) return false;
 
 	if (lightPoints.size() != 0)
-		for (i=0;i<lightPoints.size();i++) {
+		for (unsigned int i=0;i<lightPoints.size();i++) {
 			fts[j++] = lightPoints[i].x;
 			fts[j++] = lightPoints[i].y;
 			fts[j++] = lightPoints[i].z;
@@ -806,13 +805,12 @@ bool trpgLight::GetVertices(float64 *fts) const
 
 bool trpgLight::GetVertices(float32 *fts) const
 {
-	int i;
 	int j = 0;
 
 	if (!isValid()) return false;
 
 	if (lightPoints.size() != 0)
-		for (i=0;i<lightPoints.size();i++) {
+		for (unsigned int i=0;i<lightPoints.size();i++) {
 			fts[j++] = (float32)lightPoints[i].x;
 			fts[j++] = (float32)lightPoints[i].y;
 			fts[j++] = (float32)lightPoints[i].z;
@@ -884,7 +882,7 @@ trpgLight& trpgLight::operator = (const trpgLight &in)
 	Reset();
 
 	index = in.index;
-	for ( int i = 0; i < in.lightPoints.size(); i++ )
+	for (unsigned int i = 0; i < in.lightPoints.size(); i++ )
 		lightPoints.push_back(in.lightPoints[i]);
 
 	return *this;
@@ -900,7 +898,8 @@ trpgLightTable::trpgLightTable()
 {
 }
 
-trpgLightTable::trpgLightTable(const trpgLightTable &in)
+trpgLightTable::trpgLightTable(const trpgLightTable &in):
+	trpgReadWriteable(in)
 {
 	*this = in;
 }
@@ -942,7 +941,7 @@ int trpgLightTable::AddLightAttr(const trpgLightAttr& inLight)
 }
 int trpgLightTable::FindAddLightAttr(const trpgLightAttr& inLight)
 {
-	for (int i=0;i<lightList.size();i++)
+	for (unsigned int i=0;i<lightList.size();i++)
 		if (lightList[i] == inLight)
 			return i;
 
@@ -954,7 +953,7 @@ int trpgLightTable::FindAddLightAttr(const trpgLightAttr& inLight)
 trpgLightTable &trpgLightTable::operator = (const trpgLightTable &in)
 {
 	Reset();
-	for (int i=0;i<in.lightList.size();i++)
+	for (unsigned int i=0;i<in.lightList.size();i++)
 		AddLightAttr(in.lightList[i]);
 
 	return *this;
@@ -992,7 +991,7 @@ bool trpgLightTable::GetNumLightAttrs(int &no) const
 
 const trpgLightAttr* trpgLightTable::GetLightAttrRef(int id) const
 {
-	if (id < 0 || id >= lightList.size()) return NULL;
+	if (id < 0 || id >= (int)lightList.size()) return NULL;
 	return &lightList[id];
 }
 
@@ -1005,7 +1004,7 @@ bool trpgLightTable::Read(trpgReadBuffer &buf)
 	try {
 		buf.Get(numLights);
 		lightList.resize(numLights);
-		for (unsigned int i=0;i<numLights;i++) {
+		for (int i=0;i<numLights;i++) {
 			buf.GetToken(lightTok,len);
 			if (lightTok != TRPGLIGHTATTR) throw 1;
 			buf.PushLimit(len);
diff --git a/src/osgPlugins/txp/trpage_managers.cpp b/src/osgPlugins/txp/trpage_managers.cpp
index e14395636..17a350e0e 100644
--- a/src/osgPlugins/txp/trpage_managers.cpp
+++ b/src/osgPlugins/txp/trpage_managers.cpp
@@ -38,7 +38,7 @@ trpgManagedTile::trpgManagedTile()
 void trpgManagedTile::Reset()
 {
 	// Null out the local material data
-	for (int i=0;i<localMatData.size();i++)
+	for (unsigned int i=0;i<localMatData.size();i++)
 		localMatData[i] = NULL;
 	groupIDs.resize(0);
 
@@ -102,7 +102,7 @@ const trpgLocalMaterial *trpgManagedTile::GetLocMaterial(int id) const
     const std::vector<trpgLocalMaterial> *matList;
     matList = tileHead.GetLocalMaterialList();
 
-    if (id <0 || id >= matList->size())
+    if (id <0 || id >= (int)matList->size())
 	return NULL;
     
     return &(*matList)[id];
@@ -120,7 +120,7 @@ void *trpgManagedTile::GetLocalData() const
 
 bool trpgManagedTile::SetMatData(int id,void *info)
 {
-	if (id < 0 || id >= localMatData.size())
+	if (id < 0 || id >= (int)localMatData.size())
 		return false;
 
 	localMatData[id] = info;
@@ -130,7 +130,7 @@ bool trpgManagedTile::SetMatData(int id,void *info)
 
 void *trpgManagedTile::GetMatData(int id) const
 {
-	if (id < 0 || id >= localMatData.size())
+	if (id < 0 || id >= (int)localMatData.size())
 		return NULL;
 
 	return localMatData[id];
@@ -173,7 +173,7 @@ trpgPageManager::LodPageInfo::~LodPageInfo()
 void trpgPageManager::LodPageInfo::Clean()
 {
 	// Clean up managed tile structures
-        int i;
+        unsigned int i;
 	for (i=0;i<load.size();i++)
 	    if (load[i])
 		delete load[i];
@@ -328,7 +328,7 @@ bool trpgPageManager::LodPageInfo::isWithin(trpgManagedTile *tile,trpg2iPoint &s
 bool trpgPageManager::LodPageInfo::Stop()
 {
     // Empty the load list
-    int i;
+    unsigned int i;
     for (i=0;i<load.size();i++)
 	freeList.push_back(load[i]);
     load.resize(0);
@@ -361,7 +361,7 @@ void trpgPageManager::LodPageInfo::Update()
 	Some of the tiles we're supposed to load may now be
 	out of range.  Take them off the load list.
      */
-    int i;
+    unsigned int i;
     for (i=0;i<load.size();i++) {
 	if (load[i] && !isWithin(load[i],sw,ne)) {
 	    freeList.push_back(load[i]);
@@ -446,7 +446,7 @@ void trpgPageManager::LodPageInfo::Update()
 void trpgPageManager::LodPageInfo::Print(trpgPrintBuffer &buf)
 {
     char line[1024];
-    int i;
+    unsigned int i;
 
     sprintf(line,"lod = %d,  valid = %s",lod,(valid ? "yes" : "no")); buf.prnLine(line);
     sprintf(line,"pageDist = %f,  maxNumTiles = %d",pageDist,maxNumTiles);  buf.prnLine(line);
@@ -538,7 +538,7 @@ bool trpgPageManager::SetLocation(trpg2dPoint &pt)
     // Call each terrain LOD and let if figure out if something
     //  has changed.
     bool change = false;
-    for (int i=0;i<pageInfo.size();i++) {
+    for (unsigned int i=0;i<pageInfo.size();i++) {
 	if (pageInfo[i].SetLocation(pt))
 	    change = true;
     }
@@ -555,7 +555,7 @@ trpgManagedTile *trpgPageManager::GetNextLoad()
     // Look for anything that needs loaded
     // Start with lowest LOD, work up to highest
     trpgManagedTile *tile = NULL;
-    for (int i=0;i<pageInfo.size();i++) {
+    for (unsigned int i=0;i<pageInfo.size();i++) {
 	LodPageInfo &info = pageInfo[i];
 	if ((tile = info.GetNextLoad()))
 	    break;
@@ -631,8 +631,7 @@ void trpgPageManager::AckUnload()
 
     // Remove this tile's group IDs from the map
     const std::vector<int> *groupIDs = lastTile->GetGroupIDs();
-    int i;
-    for (i=0;i<groupIDs->size();i++) {
+    for (unsigned int i=0;i<groupIDs->size();i++) {
 	ManageGroupMap::iterator p = groupMap.find((*groupIDs)[i]);
 	if (p != groupMap.end())
 	    groupMap.erase(p);
@@ -647,8 +646,7 @@ void trpgPageManager::AckUnload()
 bool trpgPageManager::Stop()
 {
     bool res=false;
-    int i;
-    for (i=0;i<pageInfo.size();i++)
+    for (unsigned int i=0;i<pageInfo.size();i++)
 	res |= pageInfo[i].Stop();
 
     lastLoad = None;
@@ -662,8 +660,7 @@ void trpgPageManager::Print(trpgPrintBuffer &buf)
     sprintf(line,"Paging pos = (%f,%f),  scale = %f",pagePt.x,pagePt.y,scale);  buf.prnLine(line);
     buf.prnLine("Terrain LODs:");
 
-    int i;
-    for (i=0;i<pageInfo.size();i++) {
+    for (unsigned int i=0;i<pageInfo.size();i++) {
 	sprintf(line,"----Terrain lod %d---",i);  buf.prnLine(line);
         buf.IncreaseIndent();
 	pageInfo[i].Print(buf);
diff --git a/src/osgPlugins/txp/trpage_material.cpp b/src/osgPlugins/txp/trpage_material.cpp
index 3d6cd6855..03a4ae17e 100644
--- a/src/osgPlugins/txp/trpage_material.cpp
+++ b/src/osgPlugins/txp/trpage_material.cpp
@@ -53,7 +53,7 @@ bool trpgMatTable::isValid() const
 	if (numTable <= 0 || numMat <= 0)
 		return false;
 
-	for (int i=0;i<matTables.size();i++)
+	for (unsigned int i=0;i<matTables.size();i++)
 		if (!matTables[i].isValid())
 			return false;
 
@@ -185,7 +185,7 @@ int trpgMatTable::AddMaterialInSubtable(const trpgMaterial &mat,int table, bool
 				cmat.autoNormal == bm.autoNormal && cmat.texEnvs.size() == bm.texEnvs.size()) {
 				// Test the texture envs
 				bool isSame=true;
-				int i;
+				unsigned int i;
 				for (i=0;i<cmat.texEnvs.size();i++) {
 					trpgTextureEnv &e1 = cmat.texEnvs[i];
 					trpgTextureEnv &e2 = bm.texEnvs[i];
@@ -221,8 +221,6 @@ int trpgMatTable::AddMaterialInSubtable(const trpgMaterial &mat,int table, bool
 // Write out material table
 bool trpgMatTable::Write(trpgWriteBuffer &buf)
 {
-	int i;
-
 	if (!isValid())
 		return false;
 
@@ -233,7 +231,7 @@ bool trpgMatTable::Write(trpgWriteBuffer &buf)
 	buf.Add((int32)numMat);
 
 	// Write the materials
-	for (i=0;i<matTables.size();i++)
+	for (unsigned int i=0;i<matTables.size();i++)
 		matTables[i].Write(buf);
 
 	buf.End();
@@ -1039,7 +1037,8 @@ trpgTexture::trpgTexture()
 }
 
 // Copy construction
-trpgTexture::trpgTexture(const trpgTexture &in)
+trpgTexture::trpgTexture(const trpgTexture &in):
+	trpgReadWriteable(in)
 {
 	mode = in.mode;
 	type = in.type;
@@ -1348,7 +1347,7 @@ int32 trpgTexture::CalcTotalSize() const
 	(const_cast<trpgTexture *>(this))->CalcMipLevelSizes();
 
 	int totSize = 0;
-	for (int i=0;i<storageSize.size();i++)
+	for (unsigned int i=0;i<storageSize.size();i++)
 		totSize += storageSize[i];
 
 	return totSize;
@@ -1487,6 +1486,8 @@ void trpgTexture::CalcMipLevelSizes()
 	case trpg_FXT1:
 		isFXT = true;
 		break;
+	default:
+		break;
 	}
 
 
@@ -1589,7 +1590,8 @@ trpgTexTable::trpgTexTable()
 {
 
 }
-trpgTexTable::trpgTexTable(const trpgTexTable &in)
+trpgTexTable::trpgTexTable(const trpgTexTable &in):
+	trpgReadWriteable(in)
 {
 	*this = in;
 }
@@ -1642,7 +1644,7 @@ int trpgTexTable::AddTexture(const trpgTexture &inTex)
 }
 int trpgTexTable::FindAddTexture(const trpgTexture &inTex)
 {
-	for (int i=0;i<texList.size();i++)
+	for (unsigned int i=0;i<texList.size();i++)
 		if (texList[i] == inTex)
 			return i;
 
@@ -1660,7 +1662,7 @@ void trpgTexTable::SetTexture(int id,const trpgTexture &inTex)
 trpgTexTable &trpgTexTable::operator = (const trpgTexTable &in)
 {
 	Reset();
-	for (int i=0;i<in.texList.size();i++)
+	for (unsigned int i=0;i<in.texList.size();i++)
 		AddTexture(in.texList[i]);
 
 	return *this;
@@ -1698,14 +1700,14 @@ bool trpgTexTable::GetNumTextures(int &no) const
 bool trpgTexTable::GetTexture(int id,trpgTexture &ret) const
 {
 	if (!isValid()) return false;
-	if (id < 0 || id >= texList.size()) return false;
+	if (id < 0 || id >= (int)texList.size()) return false;
 
 	ret = texList[id];
 	return true;
 }
 const trpgTexture *trpgTexTable::GetTextureRef(int id) const
 {
-	if (id < 0 || id >= texList.size()) return NULL;
+	if (id < 0 || id >= (int)texList.size()) return NULL;
 	return &texList[id];
 }
 
@@ -1718,7 +1720,7 @@ bool trpgTexTable::Read(trpgReadBuffer &buf)
 	try {
 		buf.Get(numTex);
 		texList.resize(numTex);
-		for (unsigned int i=0;i<numTex;i++) {
+		for (int i=0;i<numTex;i++) {
 			buf.GetToken(texTok,len);
 			if (texTok != TRPGTEXTURE) throw 1;
 			buf.PushLimit(len);
diff --git a/src/osgPlugins/txp/trpage_model.cpp b/src/osgPlugins/txp/trpage_model.cpp
index 56d88f9cc..72bc1a1e2 100644
--- a/src/osgPlugins/txp/trpage_model.cpp
+++ b/src/osgPlugins/txp/trpage_model.cpp
@@ -34,7 +34,8 @@ trpgModel::trpgModel()
 	type = External;
 	useCount = 0;
 }
-trpgModel::trpgModel(const trpgModel &in)
+trpgModel::trpgModel(const trpgModel &in):
+	trpgReadWriteable(in)
 {
 	name = NULL;
 	type = External;
@@ -303,14 +304,14 @@ bool trpgModelTable::GetNumModels(int &nm) const
 }
 bool trpgModelTable::GetModel(int id,trpgModel &model) const
 {
-	if (!isValid() || id < 0 || id >= models.size())
+	if (!isValid() || id < 0 || id >= (int)models.size())
 		return false;
 	model = models[id];
 	return true;
 }
 trpgModel *trpgModelTable::GetModelRef(int id)
 {
-	if (id < 0 || id >= models.size())
+	if (id < 0 || id >= (int)models.size())
 		return NULL;
 	return &models[id];
 }
diff --git a/src/osgPlugins/txp/trpage_parse.cpp b/src/osgPlugins/txp/trpage_parse.cpp
index e5ccb9f15..fd7d72ca1 100644
--- a/src/osgPlugins/txp/trpage_parse.cpp
+++ b/src/osgPlugins/txp/trpage_parse.cpp
@@ -211,7 +211,7 @@ bool trpgr_Parser::Parse(trpgReadBuffer &buf)
 class trpgSceneHelperPush : public trpgr_Callback {
 public:
 	trpgSceneHelperPush(trpgSceneParser *in_parse) { parse = in_parse; };
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer& /*buf*/) {
 		// Call the start children callback
 		parse->StartChildren(parse->lastObject);
 		parse->parents.push_back(parse->lastObject);
@@ -225,7 +225,7 @@ protected:
 class trpgSceneHelperPop : public trpgr_Callback {
 public:
 	trpgSceneHelperPop(trpgSceneParser *in_parse) { parse = in_parse; };
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer& /*buf*/) {
 		// Make sure we don't have an extra pop
 		if (parse->parents.size() == 0)
 			// Note: let someone know about the extra pop
@@ -246,7 +246,7 @@ protected:
 class trpgSceneHelperDefault : public trpgr_Callback {
 public:
 	trpgSceneHelperDefault(trpgSceneParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer& /*buf*/) {
 		// Absorb it quietly
 		return (void *)1;
 	}
diff --git a/src/osgPlugins/txp/trpage_pparse.cpp b/src/osgPlugins/txp/trpage_pparse.cpp
index 8f76d2da9..26c52ea8d 100644
--- a/src/osgPlugins/txp/trpage_pparse.cpp
+++ b/src/osgPlugins/txp/trpage_pparse.cpp
@@ -161,7 +161,7 @@ void *trpgPrintGraphParser::ReadHelper::Parse(trpgToken tok,trpgReadBuffer &buf)
 						baseTex->GetIsMipmap(hasMipmap);
 						numMipmap = hasMipmap ? baseTex->CalcNumMipmaps() : 0;
 						for (int j=1;j<numMipmap;j++) {
-							int mipOffset = (const_cast<trpgTexture *>(baseTex))->MipLevelOffset(j);
+							//int mipOffset = (const_cast<trpgTexture *>(baseTex))->MipLevelOffset(j);
 							int mipSize = (const_cast<trpgTexture *>(baseTex))->MipLevelSize(j);
 							if (mipSize) {
 								char *pixels = new char[mipSize];
diff --git a/src/osgPlugins/txp/trpage_print.cpp b/src/osgPlugins/txp/trpage_print.cpp
index 73c7c8282..78ac1555c 100644
--- a/src/osgPlugins/txp/trpage_print.cpp
+++ b/src/osgPlugins/txp/trpage_print.cpp
@@ -245,7 +245,7 @@ bool trpgTexTable::Print(trpgPrintBuffer &buf) const
 
 	buf.prnLine("----Texture Table----");
 	buf.IncreaseIndent();
-	for (int i=0;i<texList.size();i++) {
+	for (unsigned int i=0;i<texList.size();i++) {
 		sprintf(ls,"Texture %d",i); buf.prnLine(ls);
 		texList[i].Print(buf);
 	}
@@ -264,7 +264,7 @@ bool trpgModelTable::Print(trpgPrintBuffer &buf) const
 
 	buf.prnLine("----Model Table----");
 	buf.IncreaseIndent();
-	for (int i=0;i<models.size();i++) {
+	for (unsigned int i=0;i<models.size();i++) {
 		sprintf(ls,"Model %d",i);  buf.prnLine(ls);
 		models[i].Print(buf);
 	}
@@ -307,7 +307,7 @@ bool trpgTileHeader::Print(trpgPrintBuffer &buf) const
 
 	sprintf(ls,"matList size = %d",matList.size()); buf.prnLine(ls);
 	buf.IncreaseIndent();
-	int i;
+	unsigned int i;
 	for (i=0;i<matList.size();i++) {
 		sprintf(ls,"matList[%d] = %d",i,matList[i]); buf.prnLine(ls);
 	}
@@ -344,7 +344,7 @@ bool trpgColorInfo::Print(trpgPrintBuffer &buf) const
 	sprintf(ls,"type = %d, bind = %d",type,bind);  buf.prnLine(ls);
 	sprintf(ls,"colorData size = %d",data.size());
 	buf.IncreaseIndent();
-	for (int i=0;i<data.size();i++) {
+	for (unsigned int i=0;i<data.size();i++) {
 		sprintf(ls,"color[%d] = (%f,%f,%f)",i,data[i].red,data[i].blue,data[i].green); buf.prnLine(ls);
 	}
 	buf.DecreaseIndent(2);
@@ -366,7 +366,7 @@ bool trpgTexData::Print(trpgPrintBuffer &buf) const
 	if (floatData.size()) {
 		sprintf(ls,"tex coords (float) = %d",floatData.size()); buf.prnLine(ls);
 		buf.IncreaseIndent();
-		for (int i=0;i<floatData.size()/2;i++) {
+		for (unsigned int i=0;i<floatData.size()/2;i++) {
 			sprintf(ls,"tex coord[%d] = (%f,%f)",i,floatData[i*2+0],floatData[i*2+1]);  buf.prnLine(ls);
 		}
 		buf.DecreaseIndent();
@@ -374,7 +374,7 @@ bool trpgTexData::Print(trpgPrintBuffer &buf) const
 		if (doubleData.size()) {
 			sprintf(ls,"tex coords (double) = %d",doubleData.size());
 			buf.IncreaseIndent();
-			for (int i=0;i<doubleData.size()/2;i++) {
+			for (unsigned int i=0;i<doubleData.size()/2;i++) {
 				sprintf(ls,"tex coord[%d] = (%f,%f)",i,doubleData[i*2+0],doubleData[i*2+1]),  buf.prnLine(ls);
 			}
 			buf.DecreaseIndent();
@@ -399,7 +399,7 @@ bool trpgGeometry::Print(trpgPrintBuffer &buf) const
 	sprintf(ls,"Material size = %d",materials.size());  buf.prnLine(ls);
 	buf.IncreaseIndent();
 	ls[0] = 0;
-	int i;
+	unsigned int i;
 	for (i=0;i<materials.size();i++) {
 		char locStr[100];
 		sprintf(locStr,"%d ",materials[i]);
@@ -633,12 +633,12 @@ bool trpgTileTable::Print(trpgPrintBuffer &buf) const
 	buf.IncreaseIndent();
 	sprintf(ls,"mode = %d",mode);  buf.prnLine(ls);
 	sprintf(ls,"numLod = %d",lodInfo.size());  buf.prnLine(ls);
-	for (int i=0;i<lodInfo.size();i++) {
+	for (unsigned int i=0;i<lodInfo.size();i++) {
 		const LodInfo &li = lodInfo[i];
 		sprintf(ls,"LOD %d, numX = %d, numY = %d",i,li.numX,li.numY);  buf.prnLine(ls);
 		buf.prnLine("File ID, Offset, Zmin, Zmax");
 		buf.IncreaseIndent();
-		for (int j=0;j<li.addr.size();j++) {
+		for (unsigned int j=0;j<li.addr.size();j++) {
 			sprintf(ls,"%d %d %f %f",li.addr[j].file,li.addr[j].offset,li.elev_min[j],li.elev_max[j]);  buf.prnLine(ls);
 		}
 		buf.DecreaseIndent();
@@ -660,7 +660,7 @@ bool trpgLocalMaterial::Print(trpgPrintBuffer &buf) const
 	sprintf(ls,"baseMat = %d",baseMat);  buf.prnLine(ls);
 	sprintf(ls,"(sx,sy) -> (ex,ey) = (%d,%d) -> (%d,%d)",sx,sy,ex,ey); buf.prnLine(ls);
 	sprintf(ls,"dest (width,height) = (%d,%d)",destWidth,destHeight); buf.prnLine(ls);
-	for (int i=0;i<addr.size();i++) {
+	for (unsigned int i=0;i<addr.size();i++) {
 		sprintf(ls,"addr (file,offset) = (%d,%d)",addr[i].file,addr[i].offset); buf.prnLine(ls);
 	}
 	buf.DecreaseIndent();
@@ -776,7 +776,7 @@ bool trpgLightTable::Print(trpgPrintBuffer &buf) const
 
 	buf.prnLine("----Light Table----");
 	buf.IncreaseIndent();
-	for (int i=0;i<lightList.size();i++) {
+	for (unsigned int i=0;i<lightList.size();i++) {
 		sprintf(ls,"Light %d",i); buf.prnLine(ls);
 		lightList[i].Print(buf);
 	}
@@ -834,7 +834,7 @@ bool trpgRangeTable::Print(trpgPrintBuffer &buf) const
 
 	buf.prnLine("----Range Table----");
 	buf.IncreaseIndent();
-	for (int i=0;i<rangeList.size();i++) {
+	for (unsigned int i=0;i<rangeList.size();i++) {
 		sprintf(ls,"----Range %d----",i);  buf.prnLine(ls);
 		rangeList[i].Print(buf);
 	}
@@ -863,7 +863,7 @@ bool trpgLabel::Print(trpgPrintBuffer &buf) const
 	sprintf(ls,"location: (%f %f %f)",location.x,location.y,location.z); buf.prnLine(ls);
 	sprintf(ls,"%d support points",supports.size());  buf.prnLine(ls);
 	buf.IncreaseIndent();
-	for (int i=0;i<supports.size();i++) {
+	for (unsigned int i=0;i<supports.size();i++) {
 		sprintf(ls,"%f %f %f",supports[i].x,supports[i].y,supports[i].z); buf.prnLine(ls);	
 	}
 	buf.DecreaseIndent();
@@ -901,7 +901,7 @@ bool trpgTextStyleTable::Print(trpgPrintBuffer &buf) const
 	buf.IncreaseIndent();
 	sprintf(ls,"numStyle = %d",styles.size());  buf.prnLine(ls);
 	buf.IncreaseIndent();
-	for (int i=0;i<styles.size();i++) {
+	for (unsigned int i=0;i<styles.size();i++) {
 		sprintf(ls,"Style %d",i);  buf.prnLine(ls);
 		styles[i].Print(buf);
 	}
@@ -937,7 +937,7 @@ bool trpgSupportStyleTable::Print(trpgPrintBuffer &buf) const
 	buf.IncreaseIndent();
 	sprintf(ls,"numStyle = %d",styles.size());  buf.prnLine(ls);
 	buf.IncreaseIndent();
-	for (int i=0;i<styles.size();i++) {
+	for (unsigned int i=0;i<styles.size();i++) {
 		sprintf(ls,"Style %d",i);  buf.prnLine(ls);
 		styles[i].Print(buf);
 	}
@@ -975,7 +975,7 @@ bool trpgLabelPropertyTable::Print(trpgPrintBuffer &buf) const
 	buf.IncreaseIndent();
 	sprintf(ls,"numProperty = %d",properties.size());  buf.prnLine(ls);
 	buf.IncreaseIndent();
-	for (int i=0;i<properties.size();i++) {
+	for (unsigned int i=0;i<properties.size();i++) {
 		sprintf(ls,"Property %d",i);  buf.prnLine(ls);
 		properties[i].Print(buf);
 	}
@@ -983,4 +983,4 @@ bool trpgLabelPropertyTable::Print(trpgPrintBuffer &buf) const
 	buf.DecreaseIndent();
 
 	return true;
-}
\ No newline at end of file
+}
diff --git a/src/osgPlugins/txp/trpage_range.cpp b/src/osgPlugins/txp/trpage_range.cpp
index 94f5cf7df..48ee0a4cc 100644
--- a/src/osgPlugins/txp/trpage_range.cpp
+++ b/src/osgPlugins/txp/trpage_range.cpp
@@ -42,7 +42,8 @@ trpgRange::~trpgRange(void)
 	Reset();
 }
 
-trpgRange::trpgRange(const trpgRange &in)
+trpgRange::trpgRange(const trpgRange &in):
+	trpgReadWriteable(in)
 {
 	category = NULL;
 	subCategory = NULL;
@@ -215,7 +216,7 @@ bool trpgRangeTable::GetRange(int id,trpgRange &ret) const
 	if (!isValid())
 		return false;
 
-	if (id < 0 || id >= rangeList.size())
+	if (id < 0 || id >= (int)rangeList.size())
 		return false;
 
 	ret = rangeList[id];
@@ -228,7 +229,7 @@ bool trpgRangeTable::SetRange(int id,trpgRange &inRange)
 	if (!isValid())
 		return false;
 
-	if (id < 0 || id >= rangeList.size())
+	if (id < 0 || id >= (int)rangeList.size())
 		return false;
 
 	rangeList[id] = inRange;
@@ -245,7 +246,7 @@ int trpgRangeTable::AddRange(trpgRange &range)
 
 int trpgRangeTable::FindAddRange(trpgRange &range)
 {
-	for (int i=0;i<rangeList.size();i++) {
+	for (unsigned int i=0;i<rangeList.size();i++) {
 		if (range == rangeList[i])
 			return i;
 	}
@@ -261,7 +262,7 @@ bool trpgRangeTable::Write(trpgWriteBuffer &buf)
 	buf.Begin(TRPGRANGETABLE);
 	buf.Add((int32)rangeList.size());
 
-	for (int i=0;i<rangeList.size();i++) {
+	for (unsigned int i=0;i<rangeList.size();i++) {
 		trpgRange &range = rangeList[i];
 		range.Write(buf);
 	}
@@ -307,7 +308,7 @@ trpgRangeTable & trpgRangeTable::operator = (const trpgRangeTable &inTab)
 {
 	Reset();
 
-	for (int i=0;i<inTab.rangeList.size();i++)
+	for (unsigned int i=0;i<inTab.rangeList.size();i++)
 		rangeList.push_back(inTab.rangeList[i]);
 
 	return *this;
diff --git a/src/osgPlugins/txp/trpage_rarchive.cpp b/src/osgPlugins/txp/trpage_rarchive.cpp
index a417d39b9..5d062eb2f 100644
--- a/src/osgPlugins/txp/trpage_rarchive.cpp
+++ b/src/osgPlugins/txp/trpage_rarchive.cpp
@@ -183,10 +183,10 @@ bool trpgr_Archive::ReadTile(uint32 x,uint32 y,uint32 lod,trpgMemReadBuffer &buf
 	// Reality check the address
 	int32 numLods;
 	header.GetNumLods(numLods);
-	if (lod >= numLods) return false;
+	if (lod >= (unsigned int)numLods) return false;
 	trpg2iPoint lodSize;
 	header.GetLodSize(lod,lodSize);
-	if (x >= lodSize.x || y >= lodSize.y) return false;
+	if (x >= (unsigned int)lodSize.x || y >= (unsigned int)lodSize.y) return false;
 
 	trpgTileTable::TileMode tileMode;
 	tileTable.GetMode(tileMode);
@@ -291,7 +291,7 @@ bool trpgr_Archive::trpgGetTileMBR(uint32 x,uint32 y,uint32 lod,trpg3dPoint &ll,
 	header.GetNumLods(numLod);
 	trpg2iPoint maxXY;
 	header.GetLodSize(lod,maxXY);
-	if (x >= maxXY.x || y>= maxXY.y)
+	if (x >= (unsigned int)maxXY.x || y>= (unsigned int)maxXY.y)
 		return false;
 
 	trpg3dPoint origin;
@@ -518,7 +518,7 @@ bool trpgrImageHelper::GetImagePath(const trpgTexture *tex,char *fullPath,int pa
 	tex->GetName(name,nameLen);
 	nameLen = strlen(name);
 
-	if (strlen(dir) + nameLen + 2 > pathLen)
+	if ((int)strlen(dir) + nameLen + 2 > pathLen)
 		return false;
 
 	sprintf(fullPath,"%s" PATHSEPERATOR "%s",dir,name);
diff --git a/src/osgPlugins/txp/trpage_readbuf.cpp b/src/osgPlugins/txp/trpage_readbuf.cpp
index 5394b9d6a..dbb1ce694 100644
--- a/src/osgPlugins/txp/trpage_readbuf.cpp
+++ b/src/osgPlugins/txp/trpage_readbuf.cpp
@@ -318,7 +318,7 @@ bool trpgReadBuffer::SkipToLimit()
 // See if the next read is going to blow the limits
 bool trpgReadBuffer::TestLimit(int len)
 {
-	for (int i=0;i<limits.size();i++)
+	for (unsigned int i=0;i<limits.size();i++)
 		if (len > limits[i])
 			return false;
 
@@ -329,7 +329,7 @@ bool trpgReadBuffer::TestLimit(int len)
 // We just read a few bytes.  Update the limits
 void trpgReadBuffer::UpdateLimits(int len)
 {
-	for (int i=0;i<limits.size();i++)
+	for (unsigned int i=0;i<limits.size();i++)
 		limits[i] -= len;
 }
 
@@ -359,7 +359,7 @@ bool trpgMemReadBuffer::isEmpty()
 		return true;
 
 	// Also test the limits
-	for (int i=0;i<limits.size();i++)
+	for (unsigned int i=0;i<limits.size();i++)
 		if (limits[i] == 0)  return true;
 
 	return false;
@@ -503,7 +503,7 @@ bool trpgrAppFile::Read(trpgMemReadBuffer *buf,int32 offset)
 		return false;
 	}
 
-	if (fread(data,sizeof(char),len,fp) != len) {
+	if (fread(data,sizeof(char),len,fp) != (unsigned int)len) {
 		valid = false;
 		return false;
 	}
@@ -555,7 +555,7 @@ bool trpgrAppFile::Read(char *data,int32 baseOffset,int32 objOffset,int32 dataSi
 
 	// Read the raw data
 	// Note: What about byte swapping?
-	if (fread(data,sizeof(char),dataSize,fp) != dataSize) {
+	if (fread(data,sizeof(char),dataSize,fp) != (unsigned int)dataSize) {
 		valid = false;
 		return false;
 	}
diff --git a/src/osgPlugins/txp/trpage_scene.cpp b/src/osgPlugins/txp/trpage_scene.cpp
index 9580e7b7b..ba64a87d0 100644
--- a/src/osgPlugins/txp/trpage_scene.cpp
+++ b/src/osgPlugins/txp/trpage_scene.cpp
@@ -145,7 +145,7 @@ trpgReadGroupBase::~trpgReadGroupBase()
 // Delete all children
 void trpgReadGroupBase::DeleteChildren()
 {
-	for (int i=0;i<children.size();i++)
+	for (unsigned int i=0;i<children.size();i++)
 		if (children[i])
 			delete children[i];
 }
@@ -159,7 +159,7 @@ void trpgReadGroupBase::AddChild(trpgReadNode *n)
 // Unref a child (but don't delete it)
 void trpgReadGroupBase::unRefChild(int id)
 {
-	if (id < 0 || id >= children.size())
+	if (id < 0 || id >= (int)children.size())
 		return;
 	children[id] = NULL;
 }
@@ -167,7 +167,7 @@ void trpgReadGroupBase::unRefChild(int id)
 // Unref all the children (they've probably been moved elsewhere)
 void trpgReadGroupBase::unRefChildren()
 {
-	for (int i=0;i<children.size();i++)
+	for (unsigned int i=0;i<children.size();i++)
 		unRefChild(i);
 }
 
@@ -181,7 +181,7 @@ trpgMBR trpgReadGroupBase::GetMBR() const
 		trpgMBR *cmbr = const_cast<trpgMBR *>(&mbr);
 		trpgMBR kmbr;
 		// Ask the kids
-		for (int i=0;i<children.size();i++) {
+		for (unsigned int i=0;i<children.size();i++) {
 			kmbr = children[i]->GetMBR();
 			cmbr->Union(kmbr);
 		}
@@ -232,7 +232,7 @@ trpgMBR trpgReadGeometry::GetMBR() const
 class trpgReadGeometryHelper : public trpgr_Callback {
 public:
 	trpgReadGeometryHelper(trpgSceneGraphParser *in_parse) { parse = in_parse;}
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadGeometry *geom = new trpgReadGeometry();
 		trpgGeometry *data = geom->GetData();
 		if (!data->Read(buf)) {
@@ -261,7 +261,7 @@ protected:
 class trpgReadGroupHelper : public trpgr_Callback {
 public:
 	trpgReadGroupHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadGroup *group = new trpgReadGroup();
 		trpgGroup *data = group->GetData();
 		if (!data->Read(buf)) {
@@ -286,7 +286,7 @@ protected:
 class trpgReadBillboardHelper : public trpgr_Callback {
 public:
 	trpgReadBillboardHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadBillboard *group = new trpgReadBillboard();
 		trpgBillboard *data = group->GetData();
 		if (!data->Read(buf)) {
@@ -311,7 +311,7 @@ protected:
 class trpgReadAttachHelper : public trpgr_Callback {
 public:
 	trpgReadAttachHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadAttach *attach = new trpgReadAttach();
 		trpgAttach *data = attach->GetData();
 		if (!data->Read(buf)) {
@@ -336,7 +336,7 @@ protected:
 class trpgReadLodHelper : public trpgr_Callback {
 public:
 	trpgReadLodHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadLod *lod = new trpgReadLod();
 		trpgLod *data = lod->GetData();
 		if (!data->Read(buf)) {
@@ -361,7 +361,7 @@ protected:
 class trpgReadModelRefHelper : public trpgr_Callback {
 public:
 	trpgReadModelRefHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadModelRef *mod = new trpgReadModelRef();
 		trpgModelRef *data = mod->GetData();
 		if (!data->Read(buf)) {
@@ -381,7 +381,7 @@ protected:
 class trpgReadTileHeaderHelper : public trpgr_Callback {
 public:
 	trpgReadTileHeaderHelper(trpgSceneGraphParser *in_parse) { parse = in_parse; }
-	void *Parse(trpgToken tok,trpgReadBuffer &buf) {
+	void *Parse(trpgToken /*tok*/,trpgReadBuffer &buf) {
 		trpgReadTileHeader *th = parse->GetTileHeaderRef();
 		trpgTileHeader *data = th->GetData();
 		if (!data->Read(buf))
@@ -488,12 +488,12 @@ bool trpgSceneGraphParser::StartChildren(void *in_node)
     for the parent above the current one.
    If there isn't one, we'll just stick things in our top group.
    */
-bool trpgSceneGraphParser::EndChildren(void *in_node)
+bool trpgSceneGraphParser::EndChildren(void * /*in_node*/)
 {
 	// We don't need it here, but this is the node we just
 	//  finished putting children under.  If you need to close
 	//  it out in some way, do that here
-	trpgReadNode *node = (trpgReadNode *)in_node;
+	//trpgReadNode *node = (trpgReadNode *)in_node;
 
 	// Get the parent above the current one
 	int pos = parents.size()-2;
diff --git a/src/osgPlugins/txp/trpage_tile.cpp b/src/osgPlugins/txp/trpage_tile.cpp
index da7e553ba..d22ab9caf 100644
--- a/src/osgPlugins/txp/trpage_tile.cpp
+++ b/src/osgPlugins/txp/trpage_tile.cpp
@@ -66,7 +66,7 @@ void trpgTileTable::SetNumLod(int numLod)
 
 void trpgTileTable::SetNumTiles(int nx,int ny,int lod)
 {
-	if (nx <= 0 || ny <= 0 || lod < 0 || lod >= lodInfo.size())
+	if (nx <= 0 || ny <= 0 || lod < 0 || lod >= (int)lodInfo.size())
 		return;
 
 	// Got a table we need to maintain
@@ -98,7 +98,7 @@ void trpgTileTable::SetNumTiles(int nx,int ny,int lod)
 }
 void trpgTileTable::SetTile(int x,int y,int lod,trpgwAppAddress &ref,float32 zmin,float32 zmax)
 {
-	if (lod < 0 || lod >= lodInfo.size()) return;
+	if (lod < 0 || lod >= (int)lodInfo.size()) return;
 	if (mode != Local)
 		return;
 	LodInfo &li = lodInfo[lod];
@@ -130,7 +130,7 @@ bool trpgTileTable::GetTile(int x,int y,int lod,trpgwAppAddress &ref,float32 &zm
 {
 	if (!isValid()) return false;
 
-	if (lod < 0 || lod >= lodInfo.size()) return false;
+	if (lod < 0 || lod >= (int)lodInfo.size()) return false;
 	if (mode != Local)
 		return false;
 	const LodInfo &li = lodInfo[lod];
@@ -163,7 +163,7 @@ bool trpgTileTable::Write(trpgWriteBuffer &buf)
 		buf.Add(numLod);
 
 		// Write each terrain LOD set
-		for (unsigned int i=0;i<numLod;i++) {
+		for (int i=0;i<numLod;i++) {
 			LodInfo &li = lodInfo[i];
 			buf.Add(li.numX);
 			buf.Add(li.numY);
@@ -206,7 +206,7 @@ bool trpgTileTable::Read(trpgReadBuffer &buf)
 			if (numLod <= 0) throw 1;
 			lodInfo.resize(numLod);
 
-			for (unsigned int i=0;i<numLod;i++) {
+			for (int i=0;i<numLod;i++) {
 				LodInfo &li = lodInfo[i];
 				buf.Get(li.numX);
 				buf.Get(li.numY);
@@ -215,7 +215,7 @@ bool trpgTileTable::Read(trpgReadBuffer &buf)
 				li.addr.resize(numTile);
 				li.elev_min.resize(numTile);
 				li.elev_max.resize(numTile);
-				unsigned int j;
+				int j;
 				for (j=0;j<numTile;j++) {
 					trpgwAppAddress &ref = li.addr[j];
 					buf.Get(ref.file);
@@ -260,13 +260,13 @@ void trpgTileHeader::Reset()
 // Set functions
 void trpgTileHeader::SetMaterial(int no,int id)
 {
-	if (no < 0 || no >= matList.size())
+	if (no < 0 || no >= (int)matList.size())
 		return;
 	matList[no] = id;
 }
 void trpgTileHeader::SetModel(int no,int id)
 {
-	if (no < 0 || no >= modelList.size())
+	if (no < 0 || no >= (int)modelList.size())
 		return;
 	modelList[no] = id;
 }
@@ -275,7 +275,7 @@ void trpgTileHeader::SetModel(int no,int id)
 void trpgTileHeader::AddMaterial(int id)
 {
 	// Look for it first
-	for (int i=0;i<matList.size();i++)
+	for (unsigned int i=0;i<matList.size();i++)
 		if (matList[i] == id)
 			return;
 	// Didn't find it, add it.
@@ -283,7 +283,7 @@ void trpgTileHeader::AddMaterial(int id)
 }
 void trpgTileHeader::AddModel(int id)
 {
-	for (int i=0;i<modelList.size();i++)
+	for (unsigned int i=0;i<modelList.size();i++)
 		if (modelList[i] == id)
 			return;
 	modelList.push_back(id);
@@ -310,7 +310,7 @@ bool trpgTileHeader::GetNumLocalMaterial(int32 &retNum) const
 
 bool trpgTileHeader::GetLocalMaterial(int32 id,trpgLocalMaterial &retMat) const
 {
-    if (id < 0 || id >= locMats.size())
+    if (id < 0 || id >= (int)locMats.size())
 	return false;
 
     retMat = locMats[id];
@@ -334,7 +334,7 @@ bool trpgTileHeader::GetNumMaterial(int32 &no) const
 }
 bool trpgTileHeader::GetMaterial(int32 id,int32 &mat) const
 {
-	if (!isValid() || id < 0 || id >= matList.size())
+	if (!isValid() || id < 0 || id >= (int)matList.size())
 		return false;
 	mat = matList[id];
 	return true;
@@ -347,7 +347,7 @@ bool trpgTileHeader::GetNumModel(int32 &no) const
 }
 bool trpgTileHeader::GetModel(int32 id,int32 &m) const
 {
-	if (!isValid() || id < 0 || id >= modelList.size())
+	if (!isValid() || id < 0 || id >= (int)modelList.size())
 		return false;
 	m = modelList[id];
 	return true;
diff --git a/src/osgPlugins/txp/trpage_util.cpp b/src/osgPlugins/txp/trpage_util.cpp
index 772679565..e4e43d3dd 100644
--- a/src/osgPlugins/txp/trpage_util.cpp
+++ b/src/osgPlugins/txp/trpage_util.cpp
@@ -25,3 +25,4 @@
     Instead, there's a Windows specific program that merges TerraPage archives in
     the merge/ directory of this distribution.
  */
+ 
diff --git a/src/osgPlugins/txp/trpage_util.h b/src/osgPlugins/txp/trpage_util.h
index 55c6d2e13..bf1091f7b 100644
--- a/src/osgPlugins/txp/trpage_util.h
+++ b/src/osgPlugins/txp/trpage_util.h
@@ -29,4 +29,4 @@ public:
 	enum {DoReport = 1<<0,DoCopy = 1<<1, DoTileOpt = 1<<2};
 	int merge(trpgr_Archive &inArch1,trpgr_Archive &inArch2,trpgwArchive &outArch, int flags = 0);
 };
-#endif
\ No newline at end of file
+#endif
diff --git a/src/osgPlugins/txp/trpage_warchive.cpp b/src/osgPlugins/txp/trpage_warchive.cpp
index 1ee77a7a2..c83f10232 100644
--- a/src/osgPlugins/txp/trpage_warchive.cpp
+++ b/src/osgPlugins/txp/trpage_warchive.cpp
@@ -96,8 +96,8 @@ trpgwArchive::trpgwArchive(char *inDir,char *inFile,trpg2dPoint &sw, trpg2dPoint
 		inHeader->GetTileSize(0,blockSize);
 		double dx = (oldSW.x - newSW.x)/blockSize.x + 10e-10;
 		double dy = (oldSW.y - newSW.y)/blockSize.y + 10e-10;
-		addOffset.x = dx;
-		addOffset.y = dy;
+		addOffset.x = (int)dx;
+		addOffset.y = (int)dy;
 		if (dx - addOffset.x > 10e-4 ||
 			dy - addOffset.y > 10e-4) {
 			delete inArch;
@@ -115,8 +115,8 @@ trpgwArchive::trpgwArchive(char *inDir,char *inFile,trpg2dPoint &sw, trpg2dPoint
 		trpg2dPoint tileSize;
 		inHeader->GetTileSize(i,tileSize);
 		trpg2iPoint newTileExt;
-		newTileExt.x = (newNE.x - newSW.x)/tileSize.x + 10e-5;
-		newTileExt.y = (newNE.y - newSW.y)/tileSize.y + 10e-15;
+		newTileExt.x = (int)((newNE.x - newSW.x)/tileSize.x + 10e-5);
+		newTileExt.y = (int)((newNE.y - newSW.y)/tileSize.y + 10e-15);
 		header.SetLodSize(i,newTileExt);
 	}
 
@@ -380,7 +380,7 @@ bool trpgwArchive::CheckpointHeader()
 			int32 numLod;
 			header.GetNumLods(numLod);
 			tileTable.SetNumLod(numLod);
-			for (unsigned int i=0;i<numLod;i++) {
+			for (int i=0;i<numLod;i++) {
 				trpg2iPoint lodSize;
 				header.GetLodSize(i,lodSize);
 				tileTable.SetNumTiles(lodSize.x,lodSize.y,i);
@@ -545,7 +545,7 @@ bool trpgwArchive::CheckpointHeader()
     // Write the buffer
     const char *data = buf.getData();
 
-    if (fwrite(data,sizeof(char),headLen,fp) != headLen)
+    if (fwrite(data,sizeof(char),headLen,fp) != (unsigned int)headLen)
 	{
 		strcpy(errMess, "Could not write the buffer");
 	    return false;
@@ -646,7 +646,7 @@ bool trpgwArchive::WriteTile(unsigned int x,unsigned int y,unsigned int lod, flo
 			return false;
 
 		// Write the header first
-		int len;
+		unsigned int len;
 		const char *data;
 		if (head) {
 			data = head->getData();
@@ -779,7 +779,7 @@ void trpgwGeomHelper::EndPolygon()
 	// Turn the polygon into triangles
 	// Note: Only dealing with convex here
 	matTri = matPoly;
-	int numMats=matTri.size();
+	unsigned int numMats=matTri.size();
 
 	switch (mode) {
 	case trpgGeometry::Triangles:
@@ -853,7 +853,7 @@ void trpgwGeomHelper::ResetPolygon()
 
 // Set the current color
 // Note: Required
-void trpgwGeomHelper::SetColor(trpgColor &col)
+void trpgwGeomHelper::SetColor(trpgColor& /*col*/)
 {
 //	tmpColor = col;
 }
@@ -954,8 +954,8 @@ void trpgwGeomHelper::FlushGeom()
 		break;
 	case trpgGeometry::Quads:
 		{
-			int numVert = vert.size();
-			int numMat = matTri.size();
+			unsigned int numVert = vert.size();
+			unsigned int numMat = matTri.size();
 			unsigned int loop;
 
 			// Make sure we've got quads
@@ -965,7 +965,7 @@ void trpgwGeomHelper::FlushGeom()
 				trpgGeometry quads;
 				quads.SetPrimType(trpgGeometry::Quads);
 				for (loop=0;loop<numMat;loop++) quads.AddTexCoords(trpgGeometry::PerVertex);
-				for (int i=0;i<numVert;i++) {
+				for (unsigned int i=0;i<numVert;i++) {
 					quads.AddVertex((trpgGeometry::DataType)dtype,vert[i]);
 					quads.AddNormal((trpgGeometry::DataType)dtype,norm[i]);
 					for (loop=0;loop<numMat;loop++) quads.AddTexCoord((trpgGeometry::DataType)dtype,tex[i*numMat+loop],loop);
@@ -1014,18 +1014,17 @@ optVert::optVert(int numMat, int vid, std::vector<trpg3dPoint> &iv, std::vector<
 	v=iv[vid];
 	n=in[vid];
 	tex.resize(0);
-	for (unsigned int loop=0; loop < numMat; loop++) tex.push_back(itex[vid*numMat+loop]);
+	for (unsigned int loop=0; loop < (unsigned int)numMat; loop++) tex.push_back(itex[vid*numMat+loop]);
 }
 void trpgwGeomHelper::Optimize()
 {
-	bool isStrip = false;
 	int dtype = (dataType == UseDouble ? trpgGeometry::DoubleData : trpgGeometry::FloatData);
 
 	// Potentially writing to all of these
 	strips.SetPrimType(trpgGeometry::TriStrips);
 	fans.SetPrimType(trpgGeometry::TriFans);
 	bags.SetPrimType(trpgGeometry::Triangles);
-	int numMat = matTri.size();
+	unsigned int numMat = matTri.size();
 	for (unsigned int loop =0; loop < numMat; loop++ ) {
 		strips.AddMaterial(matTri[loop]);
 		strips.AddTexCoords(trpgGeometry::PerVertex);
diff --git a/src/osgPlugins/txp/trpage_writebuf.cpp b/src/osgPlugins/txp/trpage_writebuf.cpp
index 8feb21942..273e114a4 100644
--- a/src/osgPlugins/txp/trpage_writebuf.cpp
+++ b/src/osgPlugins/txp/trpage_writebuf.cpp
@@ -344,14 +344,14 @@ bool trpgwAppFile::Append(const trpgMemWriteBuffer *buf1,const trpgMemWriteBuffe
 	// Write the data out
 	const char *data = buf1->getData();
 	int len = buf1->length();
-	if (fwrite(data,sizeof(char),len,fp) != len) {
+	if (fwrite(data,sizeof(char),len,fp) != (unsigned int)len) {
 		valid = false;
 		return false;
 	}
 	if (buf2) {
 		data = buf2->getData();
 		len = buf2->length();
-		if (fwrite(data,sizeof(char),len,fp) != len) {
+		if (fwrite(data,sizeof(char),len,fp) != (unsigned int)len) {
 			valid = false;
 			return false;
 		}
@@ -377,7 +377,7 @@ bool trpgwAppFile::Append(const char *data,int size)
 	}
 
 	// Write the data out
-	if (fwrite(data,sizeof(char),size,fp) != size) {
+	if (fwrite(data,sizeof(char),size,fp) != (unsigned int)size) {
 		valid = false;
 		return false;
 	}