Look at this card:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127591
This has TWO connectors on it, one DVI and one standard D-sub.
This is a whopping $29.95 ans free shipping.
This is what you need. You can install this card in your computer and have the dual connectors you need to view two monitors.
IF BOTH monitors have only the connector for a standard D-sub, you can get a DVI-D-sub adapter which simply plugs into the DVI port with one end and then the monitor cable plugs into the other end with the D-sub.
Here is a link for an adapter from NewEgg:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814999201
Anyway, if you bought a dual port video card like this one and then plugged your monitors into it you could view different files on them.
the best,
micro...