If you are having trouble installing drivers for your ATI card, I believe if you download and install Automatrix, it will install it for you. I agree that if you can try to figure it out on your own, you will benefit from it as installation will most likely be a similar process in most Linux distros (unless there is a preinstalled or built in option)
You could also check synaptic manager in Ubuntu to see if there is a version you can install from there.....it would also be pretty easy for you.