BTW, If you haven't upped the ram in that box, 2- 1g. sticks would make it scream... Even another 512 stick would make it a whole nuther thing. It's about a 3g processor (IIRC), so it is still way useable...
If you can get it running SP-3+, I would stuff a big drive (250+) and big ram in it, and drive it into the ground.
Befriend a good service tech in your area (back alley, not bow-tie)... good used parts are cheap.
1.5 gig is all this system can take.
I've got a couple of stick drives and a "My Passport" 320 gig USB drive (lots of room to hid a malware or virus.
A service tech in am area is at least 30 miles away,and it's not really doable. I really do live in the sticks.