I got my graphics card working now, I copied the files from the BootCD 1.5, instead of the 1.6, and didn't use the Aticonfig or the chameleon with ATI. I removed the ATI kexts that came with 10.6.7, and used ##### to install the ATI kexts from there. But I'm having a problem with getting sound over HDMI. VoodooHDA's system preferences pane manages to detect that I have HDMI audio, but I don't see digital-out (HDMI) in the sounds pane though.
I can't help with sound since It's something I haven't bother to configure. My keyboard has an onboard sound usb pnp device that allows me to seamlessly use that instead of bothering with any hardware related sound source.