I have a 2002 PowerMac G4 Quicksilver model, dual 1MHz processor, M8667LL/A model, running OS X 10.4.6. I recently did the software update to 10.4.11 and the computer crashed hard, apparently a fan problem I got repaired recently had led to hard drive damage, going up to this level of updates was too much for it. I'm assuming I should replace the hard drive as it's still giving me weird issues (reloaded 10.4.6 but freezes still at times), it's a Seagate ST380021A from what I read off the unit, don't know if it's original, it's an 80GB. Online surfing I find a ton of hard drives available, OWC's site shows replacement steps and it looks simple enough. Mind you I am VERY computer illiterate, I don't know terminology or the technical aspect of this thing, but I have installed RAM and a PCI card in it without issue. So, is basically any 80GB hard drive compatible, and it really does just plug in and mount to the case? Then, I just reload 10.4.6 again and then update to 10.4.11? Or am I missing something?