ive seen 10.0.4 running on 266 G3 with 256 ram. It was SLOW. But 10.0.4 was slow even on dual G4s.
Try to put as much ram as you can get in that machine and jaguar will run just ok. And if you can, put a faster HDD in, maybe from your home computer. That will help alot too.
And if you have a...