Ok so Im trying not to sound like such a noob but i'm having a problem and im not computer savvy.

I've got a computer running windows xp and im trying to setup some miners i've acquired.
i've got three of them connected to my computer's usb ports.  i've downloaded the drivers and they are recognized under the devices panel.

I downloaded GUIMiner and I don't know what to do next.  i run the program and get a message that no opencl devices are found.  Where do i set these up?  Keep in mind I literally have no idea what you'll be talking about.  Im just doing this for fun and as a challenge to get one bitcoin by 2015 (between mining/faucets/sales)