#export DYLD_LIBRARY_PATH="$MY_DIRECTORY/Contents/MacOS"
-cd "$MY_DIRECTORY/Contents/MacOS/NetRadiant/install"
-exec /usr/bin/open-x11 ./radiant.ppc
+cd "$MY_DIRECTORY/Contents/MacOS/install"
+if [ -x /usr/bin/open-x11 ]; then
+ exec /usr/bin/open-x11 ./radiant.ppc
+else
+ exec ./radiant.ppc
+fi