I set SleepEnabler.kext to go and install in Kext Helper, after that finished, I left Disk Utility to repair permissions. Went outside to get some fresh air, lol. Come back in, the system is sleeping. I turn it back on, and it's waking up and going to sleep perfectly.
I've attached the kext I've used. I have not yet rebooted the system after installing this, however, so use it at your own risk, and have something ready incase you need to remove it. (Although it's working normally for me.)
Install with Kext Helper, repair permissions. Voila.
EDIT:
Rebooted. No kernal panics. Sleep works great.
SleepEnabler.kext 10.8.zip