Im sorry I dont know what a e510 is but if its a desktop computer,(not laptop) what you need is a network card with two monitor ports on it. I have done this many times works like a charm.
If he can find a network card with monitor connections on it, I want one.
Your system has a free PCI express slot, so you can get any of the lower-end video cards on the market. Since you obviously don't play games on it, try this http://www.newegg.com/Product/Product.aspx?Item=N82E16814150461
Cheap, low power needed, good brand. Make sure you have the cables you need for the monitor.