I have a 600MHz G3 iMac(summer 2001 version I think). Besides RAM what upgrades can I make to it? Can the processors be upgraded. If so, are the iMacs IBM or Motorola, and can they take an IBM G3 and at what speeds. It only has a CD-RW, would it be hard to put in a drive from a DV iMac(where those combo or DVD only) if I find one. I'm guessing I can't do any thing to the video card, especially since I want to keep in in the same all in one form factor, so I don't want to shove the guts into an ATX case.