I bought a new ibook G4 800 (btw--it rocks!) and I upgraded to 640 MB RAM. I have a 128 MB DDR SDRAM chip just sitting here. I remember that the early PowerBook G3's and the Bondi iMacs shared the same type of RAM. My father in law has a Bondi at home that squeeks and burps on 64 MB. Can I use my spare chip to upgrade him to a decent level?