We all know that since Internet Explorer is integrated into the OS that you can't have two different versions of IE on one PC.  I have Vista on all my PCs, and there's no way to run IE6 on Vista.  What is a developer to do?  We could create Virtual PC running Windows XP with IE6, but why bother when the IE team has already created a freely downloadable IE6 Virtual PC image for you?  This is a lot easier and faster then going through the Windows setup wizard.

They have an IE7 image too.