I did a clean install. Updated to 10.6.8, did not reboot, ran multishit using a DSDT for my Acer 3820t (thanks to Mald0n) and reboot.
No boot. Black screen. Removed AppleIntelHDGraphics.kext, and AppleIntelHDGraphicsFB.kext from /S/L/E and voilá it worked.
Now I have a 10.6.8 laptop, with almost everything working, however, "I still haven't found what I'm looking for" that is...
Video support! I only get 1024x768 in my Intel HD Graphics card. It's identified as Intel DeviceID 0x0046 RevisionID 0x0018.
Any help will be appreciated