I hope its okay to post link to Insanelymac here. This is the guide I followed:

http://www.insanelymac.com/forum/ind...owtopic=181903

I had to make my own DSDT file though. If you look on Insanelymac, there is a guide that shows you how to create a DSDT file in Windows. There's an app called ACPI Patcher (I think). It was very straight forward.