Did you use the "tutorial" I made to play with a Nvidia GTM555 ?
If it crash when the textures should load, go in your steam directory, find the app Dragon Commander, right click on it and configure the graphic card you want to use.
It is by default the low graphic card ... Which crashes just like hell... Enjoy the beta (if it solves your problem, or else)
You don't even need to do that with the newest nvidia drivers as it shows up in the recently used apps and you can select it from there.
Anyway setting it to the Nvidia card didn't fix it in my case it was after the AVG update.
