imroberts,
Go to
http://www.ati.com/support/driver.html to get the ATI latest drivers. There is a "how to" document, though I cannot remember the name of it, but DO download this, as it tells how to install the driver.
I have an ATI Radeon 9600 Pro, which the XFree86 4.3 Radeon drivers will not work for. I never got an X window session to start up with the drivers that came with the MDK9.2 distro.
I installed the driver from ATI, FOLLOWED the instructions and got 3d hardware support. (See my earlier posting where I tried to install WITHOUT following the instructions. Idiot me!)
I hope this helps...