diff -Nurp genkernel-3.4.9.orig/generic/initrd.scripts genkernel-3.4.9/generic/initrd.scripts
--- genkernel-3.4.9.orig/generic/initrd.scripts	2008-02-03 13:14:20.000000000 +0000
+++ genkernel-3.4.9/generic/initrd.scripts	2008-02-03 13:15:16.000000000 +0000
@@ -207,6 +207,13 @@ union_setup_dir() {
 	fi
 }
 
+aufs_setup_dir() {
+	mount -t aufs -o br=$OVERLAY:$2 none $1
+	if [ "$?" -eq '0' ]; then
+		good_msg "Addition of $2 to $OVERLAY merged into $1"
+	fi
+}
+
 findnfsmount() {
 
 	if [ "${IP}" != '' ] || busybox udhcpc -R rootpath -n -s /bin/udhcpc.scripts
@@ -928,6 +935,20 @@ rundebugshell() {
 	fi
 }
 
+setup_aufs() {
+	if [ "${USE_AUFS_NORMAL}" -eq '1' ]
+	then
+		# Directory used for rw changes in union mount filesystem
+		UNION=/aufs
+		OVERLAY=/overlay
+		mkdir -p ${UNION}
+		mkdir -p ${OVERLAY}
+		mount -t tmpfs none ${OVERLAY}
+		good_msg "Loading aufs module (if module)"
+		modprobe aufs > /dev/null 2>&1
+	fi
+}
+
 setup_unionfs() {
 	if [ "${USE_UNIONFS_NORMAL}" = '1' ]
 	then
diff -Nurp genkernel-3.4.9.orig/generic/linuxrc genkernel-3.4.9/generic/linuxrc
--- genkernel-3.4.9.orig/generic/linuxrc	2008-02-03 13:14:20.000000000 +0000
+++ genkernel-3.4.9/generic/linuxrc	2008-02-03 13:18:28.000000000 +0000
@@ -84,6 +84,9 @@ do
 		unionfs)
 			USE_UNIONFS_NORMAL=1
 		;;
+		aufs)
+			USE_AUFS_NORMAL=1
+		;;
 		unionfs\=*)
 			USE_UNIONFS_NORMAL=1
 			CMD_UNIONFS=`parse_opt "${x}"`
@@ -252,11 +255,12 @@ then
 	startLUKS
 fi
 
-# Set up unionfs
+# Set up unionfs or aufs
 mkdir -p ${NEW_ROOT}
 setup_unionfs
+setup_aufs
 
-if [ "${USE_UNIONFS_NORMAL}" = '1' ]
+if [ "${USE_UNIONFS_NORMAL}" -eq '1' ] || [ "${USE_AUFS_NORMAL}" -eq '1' ]
 then
 	CHROOT=${UNION}
 else
@@ -276,7 +280,7 @@ fi
 
 if [ "${CDROOT}" = '1' ]
 then
-	if [ ! "${USE_UNIONFS_NORMAL}" = '1' ]
+	if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ] && [ ! "${USE_AUFS_NORMAL}" -eq '1' ]
 	then
 		good_msg "Making tmpfs for ${NEW_ROOT}"
 		mount -t tmpfs tmpfs ${NEW_ROOT}
@@ -610,6 +614,22 @@ then
 		mv /${UNION}/etc/fstab.new /${UNION}/etc/fstab
 	fi
 
+	if [ "${USE_AUFS_NORMAL}" -eq '1' ]
+	then
+		aufs_setup_dir ${UNION} ${NEW_ROOT}/${FS_LOCATION}
+
+		mkdir -p ${UNION}/mnt/livecd
+		if [ ! -e "${UNION}/mnt/cdrom" ]; then
+			mkdir ${UNION}/mnt/cdrom -p
+		fi
+		mount --bind ${NEW_ROOT}/${FS_LOCATION} ${UNION}/mnt/livecd
+		mount --bind ${NEW_ROOT}/mnt/cdrom ${UNION}/mnt/cdrom
+		
+		# Make sure fstab notes livecd is mounted ro.  Makes system skip remount which fails on aufs dirs.
+		sed -e 's|\(.*\s/\s*tmpfs\s*\)defaults\(.*\)|\1defaults,ro\2|' /${UNION}/etc/fstab > /${UNION}/etc/fstab.new
+		mv /${UNION}/etc/fstab.new /${UNION}/etc/fstab
+	fi
+
 	# Unpacking additional packages from NFS mount
 	# This is useful for adding kernel modules to /lib
 	# We do this now, so that additional packages can add whereever they want.
@@ -627,7 +647,7 @@ then
 	fi
 
 	
-	if [ "${USE_UNIONFS_NORMAL}" != '1' ]
+	if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ] && [ ! "${USE_AUFS_NORMAL}" -eq '1' ]
 	then
 		good_msg "Copying read-write image contents to tmpfs"
 		# Copy over stuff that should be writable
@@ -710,6 +730,11 @@ else
 		union_setup_dir ${UNION} ${NEW_ROOT}/${FS_LOCATION}
 		mkdir -p ${UNION}/tmp/.initrd
 	fi
+	if [ "${USE_AUFS_NORMAL}" -eq '1' ]
+	then
+		aufs_setup_dir ${UNION} ${NEW_ROOT}/${FS_LOCATION}
+		mkdir -p ${UNION}/tmp/.initrd
+	fi
 fi
 
 # Execute script on the cdrom just before boot to update things if necessary