@melkkoe - Are you talking about different Puppy distros or Puplets? I just had a crazy idea that I might try out using several Puplets on one distro on a MultiCD. I came across this informative forum about someone having issues GRUB'ing several Puplets and it sounds like a nice addition for a MultiCD. Just cause I'm crazy like that!
Sorry if the link doesn't work, I'm posting from my phone.