my Bios version is F6 and I used the proper DSDT from tonymac database herer, but Sleep Mode doesn't work with this solution, the computer goes into sleep (shuts down harddrives and fans) but when you want to wake him up it spins up all drives and then goes back into sleep, monitor stays black.
Moreover this sleep issue is causing a CMOS rest, so better don't sleep your computer until I or somebody else found a solution. Maybe you wanna try other Bios versions?
For my graphics card HD 5850:
Display Port isn't working nor resolutions above 1920x1080 do.. copying the 10.6.7 kexts over will disable QE/CI capabilities :/