There are many ways to take screenshots, so I will not. On this too much, this is only for those who are not sure how to
I use a program called IrfanView to take my Chatroulette screenshots. If you want to go this route here is a quick tutorial irfanview.
Open IrfanView to go to options, go to the / Screenshot Capture and click to enter Capture Setup, set capture area, note set target directory, hot keys, and then click Start.
Just use the hot keys, if you want a screenshot.