diff --git a/mk/linux/makedata-diff.sh b/mk/linux/makedata-diff.sh
new file mode 100755
index 00000000..7e0c7a6a
--- /dev/null
+++ b/mk/linux/makedata-diff.sh
@@ -0,0 +1,91 @@
+#!/bin/bash
+
+# This script compares two mega-glest data content folders for file differences, 
+# then creates an archive of ONLY the differences (including files ONLY in new version)
+
+# Below is the old version to compare with. The new version is pulled from
+# configure.ac
+OLD_VERSION=3.3.0
+
+cd release
+
+CURDIR="`pwd`"
+cd ..
+VERSION=`autoconf -t AC_INIT | sed -e 's/[^:]*:[^:]*:[^:]*:[^:]*:\([^:]*\):.*/\1/g'`
+RELEASENAME=megaglest-data-updates-$VERSION
+
+cd $CURDIR
+
+echo "Creating data package $RELEASENAME (comparing against $OLD_VERSION)"
+
+if [ ! -e megaglest-data-$VERSION-changes.txt ]; then
+	diff --brief -r -x "*~" megaglest-data-$OLD_VERSION megaglest-data-$VERSION > megaglest-data-$VERSION-changes.txt
+fi
+
+cd megaglest-data-$VERSION
+
+if [ -e ../megaglest-data-$VERSION-fileslist.txt ]; then
+	rm ../megaglest-data-$VERSION-fileslist.txt
+fi
+
+cat ../megaglest-data-$VERSION-changes.txt | while read line;
+do
+
+#echo "$line"   # Output the line itself.
+#echo `expr match "$line" 'megaglest-data-$VERSION'`
+#addfilepos=`expr match "$line" 'megaglest-data-$VERSION'`
+
+#echo [$line]
+#echo `awk "BEGIN {print index(\"$line\", \"megaglest-data-$VERSION\")}"`
+
+addfilepos=`awk "BEGIN {print index(\"$line\", \"megaglest-data-$VERSION\")}"`
+
+#echo [$addfilepos]
+#echo [${line:$addfilepos-1}]
+
+#echo [Looking for ONLY in: `expr match "$line" 'Only in '`]
+onlyinpos=`expr match "$line" 'Only in '`
+#echo [$onlyinpos]
+
+if [ "$onlyinpos" -eq "8" ]; then
+
+	echo **NOTE: Found ONLY IN string...
+
+	line=${line:$addfilepos-1}	
+	line=${line/: //}
+    line=${line/megaglest-data-$VERSION\/}
+
+	echo New path: [$line]
+else
+
+	line=${line:$addfilepos-1}	
+	line=${line/ differ/}
+    line=${line/megaglest-data-$VERSION\/}
+
+	echo New path: [$line]
+fi
+
+#compress_files="${compress_files} ${line}"
+
+#echo compress_files = [$compress_files]
+#echo ${line##megaglest-data-$VERSION*}
+
+echo "${line} " >> ../megaglest-data-$VERSION-fileslist.txt
+
+done
+#exit
+
+files_list=`cat ../megaglest-data-$VERSION-fileslist.txt`
+
+#echo compress_files = [$files_list]
+
+if [ -e ../$RELEASENAME.7z ]; then
+	rm ../$RELEASENAME.7z
+fi
+
+#echo 7za a "../$RELEASENAME.7z" $files_list
+7za a "../$RELEASENAME.7z" $files_list
+
+cd ..
+
+cd ..