Required downloads and installs.
ATI 6.10 Windows XP beta graphics drivers
Windows Directx 9.0C
GPU FAQ and installation instructions
Some of the more noteworthy things included in the FAQ:
One needs to install 6.10 or later Catalysist drivers (currently only in beta)
One needs directX 9.0C or later.
The F@H GPU beta client (5.05) times out in two months. It is expected to be replaced before then.
440PPD for x1900XT is the current standard
only one GPU supported.
I installed it and have already run into some funkyness:
Specificly, it refuses to output to my VGA dongle: It will only output directly to DVI.
The ATI drivers, don't support that Catalyst control center (How I would deal with the above problem).