I use the PC for very little - browsing the net more than anything else but will back up what little I have on it.
Dont think I have the discs for it - unless they're in the loft somewhere!
If I install a new hard drive is it a case of old one out and new one it, switch on the PC and bobs your uncle?? (I've opened the case and can see it looks fairly easy to remove/replace (may also add another 256MB Ram whilst I'm in there - would that be worthwhile??))