Help with Powercolor 4670 Video Card

[Justme2010]

I have a POWERCOLOR 4670 1GB pcie video card and I have had no luck getiing it to work properly with 10.6.4. I have tried various boot loaders. with stock 10.6.4 kexts I just get blank screen on boot and then monitor sleeps. Using kexts from 10.6.2 I get KP on atiradeonx2000.kext or scrambled screen. Have tried various output connections, VGA, DVI, HDMI.

Has anyone got this card working or any suggestions to help.