@osxfr33k

Not all MB need the CMOS reset fix for Snow (Your Gigabyte will though)

I looked at it real quick. Method DTGP is in your DSDT, but i dont think think the placement of the graphics section looks correct. So lets get that fixed so you can remove the string from your boot.Plist.

I downloaded the latest bios rom for your board from Asus. I am going to generate a DSDT with ACPI Patcher in windows with all the fixes and graphics included.

Using that... I can compare the graphics sections and fix your DSDT. I will also upload the newly generated DSDT for you to try (after work).

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GA EP35-DS3P - Intel Q9550 - 2 X 2GB Dominator 1066Mhz, EVGA 8800GTS 512MB
2x320Gb SATA in Software Raid 0, 1x1.5TB for Time machine and storage (Geekbench 6293)
10.6 Retail 64bit Using DSDT for audio-889a, video-8800gts, ethernet w/TM fix, USB fix, and SATA fix.
MacBook 2,1 - 10.6 Retail
MacBook 3,1 - 10.6 Retail