I have one 800mhz ibook g4 and one 900 mhz ibook g3 (the dual usb white one that looks almost just like the g4 one) Anyways, the hard drive in the g4 one is dead and I want to put the g3 one's hard drive into the g4. My question is, i have all my stuff on the g3's hard drive, if i took it out and put it in the g4, would it work just like on the g3 one or would i have to reformat it?