Just got a chance to look at this. Sleep from apple menu shuts the system down completely. I installed the hibernate package from Multibeast hoping that might do something but nope, not a sausage, as far as I can tell. I've had a trawl through the forum but can't see anything specific for sleep like a kext or package to enable sleep from the apple menu. What am I looking to change?
UPDATE
I did find a universal sleep enabler kext on OSX86 but it just Kernal Panics on boot with AppleCPUPowerManagement I think.