Try my modified dsdt and also the applehda kext by chadp1a.

AppleHDA - install with kext utility.

DSDT for 6860fx (I've upgraded my processor to an x7800 so not sure if it'll make a difference but try it anyways)

My audio works flawless now. I was also able to upgrade to 10.6.2. Installed the update as a standalone (not through the software update). Deleted sleepenabler.kext. Downloaded new sleepenanbler and rebooted and everything went fine.

BTW - This is the guide I used - http://www.infinitemac.com/f57/how-t...on-a-pc-t3137/

It lists 4 kexts but you can add any others you want as well. I added the applehda by the OP, plus keyboard/touch kexts.