Much Thanx to chadp1a for finding a solution for sound !! I musta been lookin for a month THANK YOUUU ! Im running a 6831 with the myhack usb installer (its the best one ive found so far) when i updated to 10.6.2 using standalone and plugged in HDMI the screen would freeze so i used the 10.6.1 NVDANV50Hal.kext and NVDAResman.kext to get it workin again !! here they are if anyone needs em.http://www.megaupload.com/?d=8EVX9G3K