Sorry for never responding.
Sleep: I still haven't gotten it to work, thou I think it's not DSDT related (I tried using an ASUS DSDT and it worked, except for sleep...)
BIOS settings: http://www.youtube.com/watch?v=zcmHdQxjANY I made the vid using some historic BIOS version, check if the settings are still the same.

You can now OC without issues using "GenerateCStates=Yes" and ""GeneratePStates=Yes" in DSDT. For this, you need to NOT have CPU info in your DSDT.