Same as AppleATIATA I made...
It has no deprecation nor warnings and has correct dependencies for loading out in 32 and 64 bit mode.
If the other drivers didn't work for you in 64 bit mode, try this one...

Download including sources:
http://rapidshare.com/files/35627618...ceATA_Snow.zip
Built kext is under build/Release.

Enjoy...