2 Monitor Setup Help

2 Monitor help
Hi all. I have heard that this game has good support for multiple monitors, but I cannot figure out how to set it up to run on my 2 monitor setup. I have a GeForce 620 with 2 monitors hooked up to it. Is there a program that I need to run in the background to make this work? Or do I need another video card and run them together with SLI? I have been considering getting a better videocard anyway, but my motherboard only have PCIe x16 slots and no expanded slots (for the card that are thick enough to require 2 slots next to each other).

Any tips on this from people running on multiple monitors (or tips on a better card that would work for me) are appreciated.

Thanks!