Hey buddy. First I want to welcome you to the forums. We are a great bunch of people from all over the world.
Now for your problem. I have mine running on dual monitors too. But I have a GeForce FX5900 and running in Horizontal Span. I first have it set to 1024x768, then in span it is running in 2048x768.
Someone should be along soon to help with your card and settings. Again, Welcome to the forums.
