At work, I run Ubuntu Linux Drapper Drake with VMWare player. I had to go to http://www.easyvmx.com/ in order to create the virtual machine for WinXP. Then the install was easy using a regular Windows XP cd. In order to get the VGA drivers working I also used vmware-tools with the vmware player. Makes a great environment to build those installers and such at work. When running my virtual machine my boss asked if I switched back to windows. I minimized the window and right back into Ubuntu!
Site – http://www.vmware.com