Ok now for the Celeron 600 @ 900.

This is a lot better! I mean I'm not leading the charts or anything but this is a drastic improvement over the default Celeron 600.

An improvement as well, still not leading the charts but its a lot better than default 600.

An improvement again, I increased my memory bandwidth by 80+ MB/s.

A 1700+ 3dmark increase! It would be a lot higher if I had an actual p3 900 but still that's pretty high for a lowly Celeron with half its cache gone. And during the benchmarks my CPU never got above ambient temp.
Ok back to the guide. So you slapped your peltier onto your chip and you overclocked, you did all that you could to stop condensation, now there is only one thing left to talk about and that's living with your peltier.