(AMD)Extreme Graphics supported, but strange behaviour

[ssprod]

Getting soooo close with this install, with NVenabler kext installed, System Profiler is showing my video correctly, and Extreme is supported, however graphics are slow to react and mouse behaviour, stuttering make it near impossible to manage. When I remove NVenabler, all is normal, but (of course) NO Extreme graphics. Any help would be appreciated, thank you.

Gear:AMD ATHLON 64 X2 4800+

Asus A8N-VM CSM

Geforce 7900 GS Video (AGP) (Disabled on board video)

Current install options used--->SL 6.2 combo

Legacy 10.2

Nvenabler

Apple HDA

Elliott CMOS

AMD