Temps seem to be fine. I am not pushing mine as hard as yours with a 900 celeron.
I have the voltage at 1.75, I do have Mushkin 133 Highspeed Ram, I can get it to post at 124FSB but it will not boot Windows!
I have a new GeForce 2 ultra, New memory, and a new CPU. The old stuf would be the hardrive, Soundcard, and the NIC!