Set up 3 monitors for my laptop

Hey all....I'm trying to set up my work laptop to run three monitors. I have a WinXP SP2 Lenovo T60 that I currently have hooked up to an external monitor. I've also got a spare T42 that I'd like to connect and use as the third, but have no idea how to use it. My T60 needs to be plugged into the network so I'm not sure what my options are. I cannot make modifications to the laptops, so installing a new video card would be out of the question. I found something on line called the Matrox Triple Head2Go, but can't seem to find anywhere in my area that sells them (and as I'm currently almost-broke, spending cash right now's not really an option).
Any suggestions? I have a wide variety of cables and switch-boxes that are available to me, but i wouldn't have a clue if they could be connected to achieve my goal.
Appreciate your ideas......
Chris

Edit...I realised that my subject line is a bit misleading - I'm trying to set up a third monitor, not have 3 more + the one on the laptop. 4 monitors would be sweet but a bit of overkill and would really cramp my desk

 

I don't believe what you are trying to do is possible. The standard laptop has a video card that supports two monitors, the one mounted to the laptop and the VGA port on the side. Cables and boxes won't help you. I have seen double 15" monitors side by side, and I believe that triple head unit works by telling the computer that the three screens are one large one and you expand your desktop out to them. This box has some type of splitter wired in.