Hello all. I know next to nothing about Macs but since my girlfriend and her entire family are Mac addicts I'm trying to learn how to work on them (although I'll never give up my PC). I've been repairing PCs for nearly two decades now so I know my way around computer hardware regardless of where it comes from. I already did some repairs to another iBook G4 of hers and it works flawlessly so I know I'm capable of disassembly and reassembly. This one that I'll be doing next just needs some upgrades and I have a few questions. First, I'll be upgrading the hard drive. I'm pretty sure the drive doesn't have to be mac specific, so my question is if I bought it from Newegg what am I looking for to insure the drive is compatible? The same question goes for RAM. It's got 512MB internal and I'm looking to drop another 512MB in it for a nice 1 Gig. Finally, I need to replace the optical drive since the one in there is dead. Where would be the best place online to find a CD burner / DVD combo drive for this computer? Thanks!