People have been experimenting with qemu and knoppix (http://www.knoppix.net/forum/viewtop...=15884&start=0). Personally, I prefer VMware Workstation for Windows, a commercial product. It allows me to run Knoppix 4.0 from within windows at a reasonable speed (Sempron 3100+, 512 MB RAM). VMware offers a free 30 day evaluation license, maybe you want to play around with it. It is also compatible with Suse Linux and Ubuntu.

Good luck!