@ 0call

why did you remove sleepenabler.kext via Windows...???

you may delete it from your OSX86 just before you restart your system after update to 10.6.3, and you have to copy the sleepenabler.kext attached together with 10.6.3 update

my previous system Acer Aspire 4736G with Snow Leopard Hazard 10.6.2 can successfully updated to 10.6.3 after remove old kext and copy new one (not replace),
and everything is running well and better... my system can shut down in less of 3 seconds