I don't see how splitting one single into two will give him seperate displays. It should just mirror it. I've never used one, so I very well could be wrong. Are you looking to game on all three at the same time, or just view pages on all three? If you are looking to game, I'd replace the motherboard. Get one that supports has two or more 16X slots. Buy two video cards, and your done. If you just want to view pages on them, or game on one with other pages up so you can check email/IMs, then buy a video card that fits in the 1x slot. http://www.newegg.com/Product/Product.aspx?Item=N82E16814161197
Expensive, but it will enable 2 more monitors on your system. I didn't look up your system specs, your motherboard doesn't have onboard video does it?