MY Steps:
(I tried all of the suggested ones none worked heres what im going to try, anything I'm missing)
1. Get up to 10.6.7
2.After update 10.6.7 succes, remove or delete "caches folder" on library
3.Remove or delete "caches folder" on sytem/library
4.Run Disk Utility and click Repaired disk permissions
5.Restart or reboot
6.BackUp AppleACPIPlatform.kext & IOPCIFamily.kext on system/library/extensions folder
7.BackUp IOUSBFamily.kext & IOUSBMasstroageClass.kext on system/library/extensions folder
8.Run 10.6.8 ComboUpdate>wait to finish>Don't Restart or Reboot Computer
9.Copy AppleACPIPlatform.kext & IOPCIFamily.kext (U BackUp) to Sytem/Library/Extensions Folder
10.Run Kext Utility>wait to finish>Restart or Reboot Computer