How does one downgrade (or upgrade) a videocard in osx? aslo are there any other mac forums out there?

[sandni99a]

Osx isn't easy to use as that hippie in those mac ads claims.

I have a 1950pro jccool'ed running right now. Since qe/ci doesn't work, I have a x1600pro laying around...I wanted to see how QE/CI works...what steps should I take (driver wise) to downgrade to x1600pro? Something tells me that it's not just a matter of replacing the card.

I'm running P5BDeluxe board if that matters any.