multicd.sh is my script to combine several ISOs into one. It started out supporting DSL, Puppy and GParted, and now supports over 20 Linux distros (wow!) as well as any floppy disk image.
The official webiste, at which new versions can be found, is at http://multicd.tuxfamily.org/.
The old Ubuntu Forums thread was in the Other OS Talk section at http://ubuntuforums.org/showthread.php?t=718016. It was about time for a new thread anyway