It's been a while since I did my fix, but here are a few things that caught me
DSDT would never recompile, there is a version someone posted in this thread to download, its worked at 10.6.2 for me and 10.6.7.
Extra and Extra.bak are two different things, first time it ended with me doing a reinstall. I was completely new to OS X, last Mac I used personally ran OS 7.5.5. This most recent install, it took about 5 minutes. Doing it a few times has helped.
Heres the spec im running as that does define a few things.
32GB Runcore
NBI Special 0.8.4
10.6.7
Dell M4500 i7 940XM, 8GB DDR3, 256GB SSD, Quadro FX1800M, 15.6" screen at 1080p. Win 7 Pro.
Black Dell Mini 9. 2GB G Skill RAM, 32GB Runcore, Dell 1510 "Airport Extreme", US Intl keyboard, 2.0 MP webcam, OS X 10.6.7,Bluetooth, sleep, ALC 268 fix and a proper Apple logo.