Knoppix 3.4 and Dual Display (running two monitors)

I am new to Linux. I currently run dual displays with Windows XP, and most of you know that it is easy to do this. How do I run two monitors with Linux (Knoppix 3.4). I have bumped into a couple of ways to do it, but I have failed miserably. Is there an easy way to do this?

Thanks a bunch! :)