Installed with Kakewalk 2.2 USB version and Retail image from 10.6.0. Update to 10.6.4. Videocard is a NVIdia 7300GT and there for running 32 bits: arch=i386
Sound ALC888.kext for 10.6.4 When updating to 10.6.4 replace /System/Library/Extension/AppleHDA.kext: http://www.box.net/shared/ydzvzaxvu7 = AppleHDA.kext to get sound working again.
Put NullCPUPowerManagement.kext and SleepEnabler.kext in /Extra
Rebuild cache with Kext Utility http://www.kexts.com/view/129-kext_utility_x64_for_snowleopard_(update).html
Restart and you have got 1. A cool CPU: 39°C 2. Sleep enabled, thanks to Burger for testing 3. Sound with 10.6.4
Good luck, and many thanks to mrjanek for making Kakewalk