Virtualization for Beginner

Hello Friends As a member of a local linux group called GLT, a few different distros of GNU-Linux we have to handle. One or two versions of each Fedora, Ubuntu, and OpenSuse. Earlier, I installed more than one Linux on the HD just for getting some suggestion when someone is in problem. Gradually, due to the UUID and all this is becoming problemsome. One brute way out is to rewrite 'fstab' with device-names in place of UUID-s. But people say these days a lot of applications read the UUID-s, so this may get problemsome. So, after some friends suggested, I now want to go into virtualization. And I know nothing. I have a really huge amount of HD space, and 4GB memory. And my CPU has the virtualization flags. I am myself using Fedora 11 Beta and I want to have virtual installations of Ubuntu and OpenSuse on my system. Can you people please suggest me from where to start, some good documentation, and not too technical. We are a Linux-User group, mainly teachers in profession. Thanking You -- দাশ das http://ddts.randomink.org/