diff --git a/download_and_compile.sh b/download_and_compile.sh
index d18edd0..890957f 100755
--- a/download_and_compile.sh
+++ b/download_and_compile.sh
@@ -63,7 +63,7 @@ _elementIn(){
 # From <https://stackoverflow.com/questions/1527049/how-can-i-join-elements-of-an-array-in-bash>
 function _joinBy(){
   local d="$1"; shift
-  echo -n "$1"; shift
+  printf "%s" "$1"; shift
   printf "%s" "${@/#/$d}"
 }
 
@@ -1511,28 +1511,29 @@ if _elementIn "FGFS" "${WHATTOBUILD[@]}" || \
   fi
   cd "$CBD"
 
-  paths="../../$SIMGEAR_INSTALL_DIR/lib:../../$OSG_INSTALL_DIR/lib:../../$OPENRTI_INSTALL_DIR/lib:../../$PLIB_INSTALL_DIR/lib"
-  gdb="gdb"
-
-  common=""
-  common="${common}#!/bin/sh\n"
-  common="${common}cd \"\$(dirname \"\$0\")\"\n"
-  common="${common}cd '$SUB_INSTALL_DIR/$FGFS_INSTALL_DIR/bin'\n"
+  paths="\$d/$SIMGEAR_INSTALL_DIR/lib:\$d/$OSG_INSTALL_DIR/lib:\$d/$OPENRTI_INSTALL_DIR/lib:\$d/$PLIB_INSTALL_DIR/lib"
+  common="#! /bin/sh"$'\n\n'
 
   if [[ "$(uname)" == 'OpenBSD' ]]; then
     # Force use of our zlib.
-    paths="$paths:../../$ZLIB_INSTALL_DIR/lib"
+    paths="$paths:\$d/$ZLIB_INSTALL_DIR/lib"
     # OpenBSD's base gdb is too old; `pkg_add egdb` gives one that we can use.
     gdb="egdb"
-    common="${common}ulimit -d 4194304\n"
+    common="${common}ulimit -d 4194304"$'\n'
   fi
 
-  set_ld_library_path="export LD_LIBRARY_PATH='$paths'\"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}\""
-  common="${common}${set_ld_library_path}\n"
+  set_ld_library_path="\
+d=\$(realpath \"\$(dirname \"\$0\")/$SUB_INSTALL_DIR\")
+export LD_LIBRARY_PATH=$paths\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}"
+  common="\
+${common}${set_ld_library_path}
+cd \"\$d/$FGFS_INSTALL_DIR/bin\""$'\n'
 
   SCRIPT=run_fgfs.sh
-  echo -en "$common" > $SCRIPT
-  echo "exec ./fgfs --fg-root=\"\$PWD/../fgdata\" \"\$@\"" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+$common
+exec ./fgfs --fg-root="\$d/$FGFS_INSTALL_DIR/fgdata" "\$@"
+EndOfScriptText
   chmod 755 $SCRIPT
 
   SCRIPT=run_fgfs_debug.sh
@@ -1572,7 +1573,7 @@ eval set -- "\$TEMP"
 
 while true; do
   case "\$1" in
-    -c|--core-file) CORE_FILE="\$2"; shift 2 ;;
+    -c|--core-file) CORE_FILE=\$(realpath "\$2"); shift 2 ;;
     --help) echo "\$USAGE"; exit 0 ;;
     --) shift; break ;;
     *) echo "\$PROGNAME: unexpected option '\$1'; please report a bug." >&2
@@ -1580,16 +1581,16 @@ while true; do
   esac
 done
 
-cd "\$(dirname "\$0")/$SUB_INSTALL_DIR/$FGFS_INSTALL_DIR/bin"
 ${set_ld_library_path}
+cd "\$d/$FGFS_INSTALL_DIR/bin"
 
 if [ -z "\$CORE_FILE" ]; then
-  gdb --directory="$INSTALL_DIR_SIMGEAR" \\
-      --directory="$INSTALL_DIR_FGFS" \\
-      --args ./fgfs --fg-root="$INSTALL_DIR_FGFS/fgdata" "\$@"
+  gdb --directory="$CBD/simgear" \\
+      --directory="$CBD/flightgear" \\
+      --args ./fgfs --fg-root="\$d/$FGFS_INSTALL_DIR/fgdata" "\$@"
 else
-  gdb --directory="$INSTALL_DIR_SIMGEAR" \\
-      --directory="$INSTALL_DIR_FGFS" \\
+  gdb --directory="$CBD/simgear" \\
+      --directory="$CBD/flightgear" \\
       --core="\$CORE_FILE" ./fgfs
 fi
 EndOfScriptText
@@ -1598,8 +1599,7 @@ EndOfScriptText
   # Useful for debugging library problems.
   SCRIPT=run_ldd.sh
   cat >"$SCRIPT" <<EndOfScriptText
-#!/bin/sh
-
+$common
 usage() {
   echo "Usage: \$0 LDD_ARGUMENT..."
   echo "Run 'ldd' with the same LD_LIBRARY_PATH setup as done inside run_fgfs.sh."
@@ -1613,10 +1613,6 @@ if [ \$# -eq 0 ] || [ "\$1" = "--help" ]; then
   exit 1
 fi
 
-cd "\$(dirname "\$0")"
-cd '$SUB_INSTALL_DIR/$FGFS_INSTALL_DIR/bin'
-export LD_LIBRARY_PATH='../../$SIMGEAR_INSTALL_DIR/lib:../../$OSG_INSTALL_DIR/lib:../../$OPENRTI_INSTALL_DIR/lib:../../$PLIB_INSTALL_DIR/lib'"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}"
-
 exec ldd "\$@"
 EndOfScriptText
   chmod 755 "$SCRIPT"
@@ -1626,18 +1622,17 @@ EndOfScriptText
   cat >"$SCRIPT" <<EndOfScriptText
 #! /bin/sh
 
-d="\$(dirname "\$0")/$SUB_INSTALL_DIR"
-export LD_LIBRARY_PATH="\$d/simgear/lib:\$d/openscenegraph/lib:\$d/openrti/lib:\$d/plib/lib\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}"
+${set_ld_library_path}
 exec "\$@"
 EndOfScriptText
   chmod 755 "$SCRIPT"
 
   SCRIPT=run_fgcom.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd '$SUB_INSTALL_DIR/$FGFS_INSTALL_DIR/bin'" >> $SCRIPT
-  echo "exec ./fgcom \"\$@\"" >> $SCRIPT
-  chmod 755 $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+$common
+exec ./fgcom "\$@"
+EndOfScriptText
+  chmod 755 "$SCRIPT"
 fi
 
 #######################################################
@@ -1672,12 +1667,14 @@ if _elementIn "FGRUN" "${WHATTOBUILD[@]}"; then
   cd "$CBD"
 
   SCRIPT=run_fgrun.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd '$SUB_INSTALL_DIR/$FGRUN_INSTALL_DIR/bin'" >> $SCRIPT
-  echo "export LD_LIBRARY_PATH='../../$SIMGEAR_INSTALL_DIR/lib:../../$OSG_INSTALL_DIR/lib:../../$OPENRTI_INSTALL_DIR/lib:../../$PLIB_INSTALL_DIR/lib'\"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}\"" \
-       >> $SCRIPT
-  echo "./fgrun --fg-exe=\"\$PWD\"/../../'$FGFS_INSTALL_DIR/bin/fgfs' --fg-root=\"\$PWD\"/../../'$FGFS_INSTALL_DIR/fgdata' \"\$@\"" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+
+${set_ld_library_path}
+cd "\$d/$FGRUN_INSTALL_DIR/bin"
+exec ./fgrun --fg-exe="\$d/$FGFS_INSTALL_DIR/bin/fgfs" \
+             --fg-root="\$d/$FGFS_INSTALL_DIR/fgdata" "\$@"
+EndOfScriptText
   chmod 755 $SCRIPT
 fi
 
@@ -1703,11 +1700,11 @@ if _elementIn "FGO" "${WHATTOBUILD[@]}"; then
   cd "$CBD"
 
   SCRIPT=run_fgo.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd '$SUB_INSTALL_DIR'" >> $SCRIPT
-  echo "cd '$FGO_INSTALL_DIR'" >> $SCRIPT
-  echo "python ./fgo" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+cd "\$(dirname "\$0")/$SUB_INSTALL_DIR/$FGO_INSTALL_DIR"
+exec python2 ./fgo
+EndOfScriptText
   chmod 755 $SCRIPT
 fi
 
@@ -1759,10 +1756,11 @@ if _elementIn "FGX" "${WHATTOBUILD[@]}"; then
   cd "$CBD"
 
   SCRIPT=run_fgx.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd '$FGX_INSTALL_DIR'" >> $SCRIPT
-  echo "./fgx \"\$@\"" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+cd "\$(dirname "\$0")/$SUB_INSTALL_DIR/$FGX_INSTALL_DIR"
+exec ./fgx "\$@"
+EndOfScriptText
   chmod 755 $SCRIPT
 fi
 
@@ -1785,10 +1783,11 @@ if _elementIn "ATCPIE" "${WHATTOBUILD[@]}"; then
   cd "$CBD"
 
   SCRIPT=run_atcpie.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd '$SUB_INSTALL_DIR/$ATCPIE_INSTALL_DIR'" >> $SCRIPT
-  echo "./ATC-pie.py \"\$@\"" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+cd "\$(dirname "\$0")/$SUB_INSTALL_DIR/$ATCPIE_INSTALL_DIR"
+exec ./ATC-pie.py "\$@"
+EndOfScriptText
   chmod 755 $SCRIPT
 fi
 
@@ -1811,10 +1810,11 @@ if _elementIn "OPENRADAR" "${WHATTOBUILD[@]}"; then
   fi
 
   SCRIPT=run_openradar.sh
-  echo "#!/bin/sh" > $SCRIPT
-  echo "cd \"\$(dirname \"\$0\")\"" >> $SCRIPT
-  echo "cd install/OpenRadar" >> $SCRIPT
-  echo "java -jar OpenRadar.jar" >> $SCRIPT
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+cd "\$(dirname "\$0")/$SUB_INSTALL_DIR/OpenRadar"
+exec java -jar OpenRadar.jar
+EndOfScriptText
   chmod 755 $SCRIPT
 fi
 
@@ -1849,26 +1849,29 @@ if _elementIn "TERRAGEAR" "${WHATTOBUILD[@]}"; then
   _make terragear
 
   cd "$CBD"
-  echo "#!/bin/sh" > run_tg-construct.sh
-  echo "cd \"\$(dirname \"\$0\")\"" >> run_tg-construct.sh
-  echo "cd install/terragear/bin" >> run_tg-construct.sh
-  echo "export LD_LIBRARY_PATH='$INSTALL_DIR_SIMGEAR/lib'\"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}\"" \
-       >> run_tg-construct.sh
-  echo "./tg-construct \"\$@\"" >> run_tg-construct.sh
+  SCRIPT=run_tg-construct.sh
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+${set_ld_library_path}
+cd "\$d/terragear/bin"
+exec ./tg-construct "\$@"
+EndOfScriptText
 
-  echo "#!/bin/sh" > run_ogr-decode.sh
-  echo "cd \"\$(dirname \"\$0\")\"" >> run_ogr-decode.sh
-  echo "cd install/terragear/bin" >> run_ogr-decode.sh
-  echo "export LD_LIBRARY_PATH='$INSTALL_DIR_SIMGEAR/lib'\"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}\"" \
-       >> run_ogr-decode.sh
-  echo "./ogr-decode \"\$@\"" >> run_ogr-decode.sh
+  SCRIPT=run_ogr-decode.sh
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+${set_ld_library_path}
+cd "\$d/terragear/bin"
+exec ./ogr-decode "\$@"
+EndOfScriptText
 
-  echo "#!/bin/sh" > run_genapts850.sh
-  echo "cd \"\$(dirname \"\$0\")\"" >> run_genapts850.sh
-  echo "cd install/terragear/bin" >> run_genapts850.sh
-  echo "export LD_LIBRARY_PATH='$INSTALL_DIR_SIMGEAR/lib'\"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}\"" \
-       >> run_genapts850.sh
-  echo "./genapts850 \"\$@\"" >> run_genapts850.sh
+  SCRIPT=run_genapts850.sh
+  cat >"$SCRIPT" <<EndOfScriptText
+#!/bin/sh
+${set_ld_library_path}
+cd "\$d/terragear/bin"
+exec ./genapts850 "\$@"
+EndOfScriptText
 
   chmod 755 run_tg-construct.sh run_ogr-decode.sh run_genapts850.sh
 fi
@@ -1918,10 +1921,9 @@ if _elementIn "TERRAGEARGUI" "${WHATTOBUILD[@]}"; then
   _log "Creating $SCRIPT"
   cat >"$SCRIPT" <<EndOfScriptText
 #! /bin/sh
-cd "\$(dirname "\$0")"
-cd '$SUB_INSTALL_DIR/$TGGUI_INSTALL_DIR/bin'
-export LD_LIBRARY_PATH='$INSTALL_DIR_SIMGEAR/lib'"\${LD_LIBRARY_PATH:+:}\${LD_LIBRARY_PATH}"
-./TerraGUI "\$@"
+${set_ld_library_path}
+cd "\$d/$TGGUI_INSTALL_DIR/bin"
+exec ./TerraGUI "\$@"
 EndOfScriptText
   chmod 755 "$SCRIPT"
 fi