I downloaded what was described on AMD's website as the display driver installer manager (versions 12-4 and 11-12). It unpacked to C:\AMD\Support\12-4_xp32_dd_ccc and ran by default creating another set of files (it runs like an installer) at C:\Program Files\ATI\CIM then asks if I would like to update it (called AMD Catalyst Install Manager, the check box is grayed out, but it says it's already installed in the description box below it) or install an audio driver or runtime program. There is no choice for AMD Display Driver, presumably because the catalyst install manager doesn't see the graphics card. My computer seems to have trouble knowing what graphics cards are when they don't have drivers installed and calls them "unknown device"s.
Forgot to mention this is windows XP 32 bit.