You might try PCLinuxOS if you want to get an ATI card working with a minimum of hassle and frustration.
I've never had any luck with Linux + ATI Video cards but the latest PCLinuxOS Live CD automatically detected and installed the correct ATI drivers for my laptop's dodgy ATI Mobility card.
Since you can try it first by booting from the CD rather than installing it to your HD, it might be worth you checking it out. It sure beats struggling to install ATI drivers on other Linux distros, that's for sure.
I've never had any luck with Linux + ATI Video cards but the latest PCLinuxOS Live CD automatically detected and installed the correct ATI drivers for my laptop's dodgy ATI Mobility card.
Since you can try it first by booting from the CD rather than installing it to your HD, it might be worth you checking it out. It sure beats struggling to install ATI drivers on other Linux distros, that's for sure.