I got in but can't play :(

Make sure you get the latest drivers for your video card from http://www.geforce.com/Drivers (or go to nvidia.com which redirects to there now, news to me..)

I've seen games go from being a slideshow of unplayability to completely playable just by upgrading drivers.

I haven't tested the game on your specific card so I can't guarantee it'll make it playable, but it's certainly worth a try.