well, that didn't work. but i booted back into my nightly clone and ran Mountain Lion Multibeast form there, and it seems i'm up and going (though, i still have to have GraphicsEnabler=Yes). That's a little disconcerting, since after switching to a GTX570, that was a driving force for the upgrade to ML.
EDIT: well, nothing will launch, all the Stock Apple programs crash right away at luanhc, except Safari (like mail for example)