I have a powerbook G4 (aluminum series, 17") and it started to freeze a few days ago. I'm trying to do a clean install, but every time I restart the computer it freezes before I can even get the startup disk to run. Is there another way I can re-set/or do a clean install without having to run the disks? Or maybe a special button/combination of things or stick a paperclip somewhere... I have tried to reset the PRAM and I've done Command + Option + Power, and it still freezes after a few minutes.