EnzoFX, have you tried any of the other dsdt's posted in this thread. Lanxxx and some others, have the same board that you are using. I dont have any USB disabled in bios. Just the onboard controller (jmicron) disabled.

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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