Nvidia 8600gt not working on iPC 10.5.6

[handz]

I currently have Zephyroth's 10.5.2 working flawlessly on my AMD machine (nforce ata, nforce lan, nvinject v52, alc883). However, I have installed iPC 10.5.6 a few times and never have got the video to work (Nvidia 8600gt). I have tried selecting the correct nvinject packages during install, and also unchecking them and trying to install nvinject v52 afterwords.

If anyone has any ideas, that would be great

thanks