Following the recent launch of the Quantum Force website for Foxconn enthusiast boards found here (http://quantum-force.net/ I stumbled upon a Beta bios section (after registration) where they not only host W1z's AMD GPU tool but modded BIOS files for 2900XT CF users that claim up 1.35v in 3d...
I am in exactly the same boat here, nearly pulling my hair out in search of an application that supports voltage adjustments for my 1GB Powercolor 2900XT. -pray- cmon W1zzard, show us some lovin? :P