The generic drivers should at least get you to a GUI and from there you should be able to configure your hardware using the installed package. You could do it manually in /etc/X11/XF86Config. Here's a sample from my current setup.
Code:
Section "Device"
BoardName "Rage 3D Pro AGP"
BusID "1:0:0"
Driver "ati"
Identifier "Device[0]"
Screen 0
VendorName "ATI"
EndSection
You would want to tale note of what the driver (server) for your card is named. It should have been placed in your /usr/X11/bin folder (or wherever your Xwindows default is).