While reading NLSC forum I've noticed that many of you, guys, have problems with configuring in-game graphics and tuning your video cards.
So I decided to give you a little advice.
Download this nice tool:
http://www.nvworld.ru/downloads/rivatuner.zip
It's the last build of RivaTuner.
This great utility can overclock your video card and configure almost every aspect of Direct 3D rendering and OpenGL rendering which is controlled by graphics card driver.
You can check every setting by clicking right mouse button and selecting "What's this?".
Here are the features of RivaTuner:
http://www.nvworld.ru/docs/rt_e.html
Here is RivaTuner's FAQ:
http://www.nvworld.ru/docs/rt_faq_e.html
Bad news for ATI users, RivaTuner is made with nVidia cards in mind.
I hope that this will help some of you. If you've got any questions about graphics, just ask.