I've got it running perfect on my Asus P5VD2-VM with 9800GT 1gb card.

You need to have Quartz Extreme and CI installed otherwise the game won't boot. The best way to do this is download and install Aquamac's Nvidia 9 series Macbook Pro drivers and also the NV .52 installer.pkg (google them). Install Aquamac's drivers THEN the NV installer afterwards, and you should have a perfectly working system.

Though my card is a 1gb, it currently reads 768mb because the 1gb option is not available with Quartz Extreme.