Index: b/scripts/casper
===================================================================
--- a/scripts/casper	2010-06-28 17:54:49.000000000 +0200
+++ b/scripts/casper	2011-02-02 17:24:02.000000000 +0100
@@ -29,6 +29,8 @@
     touch /casper.vars
 fi
 
+export IMAGE_NAME
+
 parse_cmdline() {
     for x in $(cat /proc/cmdline); do
         case $x in
@@ -48,6 +50,8 @@
                 export STATICIP ;;
             ignore_uuid)
                 IGNORE_UUID="Yes" ;;
+            imagename=*)
+				IMAGE_NAME="${x#imagename=}" ;;
             live-media-path=*)
                 LIVE_MEDIA_PATH="${x#live-media-path=}"
                 export LIVE_MEDIA_PATH
@@ -398,7 +402,7 @@
                 # it is a plain directory: do nothing
                 rofsstring="${image}=${roopt}:${rofsstring}"
                 rofslist="${image} ${rofslist}"
-            elif [ -f "${image}" ]; then
+            elif [ -f "${image}" ] && [ -z "$IMAGE_NAME" -o "${imagename}" = "$IMAGE_NAME" ] ; then
                 backdev=$(get_backing_device "$image")
                 fstype=$(get_fstype "${backdev}")
                 if [ "${fstype}" = "unknown" ]; then