--- mkisoimages.sh	2011-10-18 10:40:26.000000000 -0400
+++ mkisoimages.sh	2011-11-06 08:41:32.000000000 -0500
@@ -38,7 +39,14 @@ 
 
 LABEL=$1; shift
 NAME=$1; shift
+BASE=$1; shift
+EXTRA=$1; shift
 
-echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $1/etc/fstab
-makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $*
-rm $1/etc/fstab
+# If extra-bits-dir was passed and its a valid directory, include its contents.
+if [ -d "$EXTRA" ]; then
+	cp -a $EXTRA/ $BASE || exit 1
+fi
+
+echo "/dev/iso9660/`echo $LABEL | tr '[:lower:]' '[:upper:]'` / cd9660 ro 0 0" > $BASE/etc/fstab
+makefs -t cd9660 $bootable -o rockridge -o label=$LABEL $NAME $BASE
+rm $BASE/etc/fstab