Thanks to the information on this forum I've successfully got SL 10.6.4 running on my overclocked q6600 P5K-E Wifi A/P

I used the myhack method and installed the following kexts on top

AD1988bFix.kext
The latest Fakesmc.kext
IONetworkingFamily.kext
JMicronATA.kext
SleepEnabler.kext
VoodooHDA.kext,
I used the Realtek_RTL8187 installer to get the wifi card working.

Theres one thing I'd like to iron out:

In the profiler>Serial ATA the Intel SATA controller is showing as UnKnown AHCI standard controller. Can this be changed to show the Intel ICH9R controller correctly by using a kext or DSDTSE hack?

EDIT:

Sorted this by editing /System/Library/Extensions/AppleACHIPort.kext/Contents/Info.plist

Under IOKitPersonalities I added:

<key>ICH9RAHCI</key>
<dict>
<key>CFBundleIdentifier</key>
<string>com.apple.driver.AppleAHCIPort</string>
<key>Chipset Name</key>
<string>ICH9R AHCI</string>
<key>IOClass</key>
<string>AppleAHCI</string>
<key>IOPCIPrimaryMatch</key>
<string>0x29228086</string>
<key>IOProbeScore</key>
<integer>2000</integer>
<key>IOProviderClass</key>
<string>IOPCIDevice</string>
<key>Vendor Name</key>
<string>Intel</string>
</dict>

10.6.5 update now working using new 64 bit SleepEnabler.kext