I didn't see the ATI Radeon X800XT AIW on the list....
ATI is a pain, they are only recently starting to open up to the Linux market, and have started providing drivers and such, but they have some work to do. I have a couple of AIW cards too. nVida is actually more Linux friendly right now. There are other open source projects (GATOS) for the older ATI cards. ATI's web site will point you to them.