Hello, I have one of the first released macbooks 2.2ghz dual core (not core2duo or newer). I just replaced the hard drive and installed xp on it first due to my osx install discs being scratched. I've gotten my discs refinished but for some reason they wont run at boot. I've tried resetting the pram, holding c, and holding d to get it to boot from the disk, but it wont... It just sounds like its trying to read it, then stops spinning and spits out the disc and reverts back to xp. I'd really just like to wipe xp off of it and put osx back on it but am having this problem. Any help is greatly appreciated.