For those of us who need to test web sites on multiple browsers: How to Install Two Versions of IE (IE6 and IE7) on One Machine: “While it’s not easy to install (there are 19 steps) and there are some gotchas (the hard drive image Microsoft provides expires on April 1, 2007), this is still a less expensive way to test your creations on IE 6 while taking advantage of all the changes in IE 7.”

It would seem my only other options are to nuke Ubuntu Linux off my old AthlonXP machine and reinstall Windows 2000 Pro, or make my old machine an Ubuntu/Win2kPro dual boot machine.

Update: go straight to the source.