Have a graphic card that supports more than 1 output. Most graphics cards (even low end) have at least 2 output, VGA and DVI.

Connect 2 monitors to it, and select extended desktop in your display properties.

I use dual video card (ATI 5770 crossfire) and connect to 3 monitors. 2 x 42" LCD connecting using HDMI and 1 x 24" LCD using DVI.

Of course you can use a video card that does have 3 output but based on my experience, the image is a bit sluggish. Also you need to be sure you have enough power to run those. I'm using 700W power supply.

You can use the Windows Display Properties to setup. But most video cards have their own program to run and manage the display much better.

If you are looking for some budget type, you can probably get a VGA or DVI splitter.

That is extended desktop. If he was using duplicate view option, the icons would appear on the CRT as well. But in this case, it isn't