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It’s pretty rare to have two video ports on a laptop, which is what would make it easiest to connect two external monitors (I’m not sure about your laptop specifically). There are cables available that split the signal from one port to two monitors, so you might want to see if you can use one of those with your laptop. Of course, if you just add one external monitor, you will still have two if you count the laptop display. That’s probably what I would do, then chose the “extend display” option in Windows 7 to give it more of a traditional two display feel.
Dell has a guide on how to setup dual monitors in Windows 7 that you might find helpful. It’s pretty easy as long as you have the video card, cables and ports to support it.