I just installed one of these cards from Apple. Updated to 10.6.8 (inc MacOSXUpd10.6.8Supp.dmg) and installed:
  • cudadriver-4.0.19-macos.dmg
  • Retail_256.02.25f1v1.dmg

from the NVidia site.

Is there anything else required to use this card to its full resources?

Cheers, P