I’m running Vista on my laptop for work. For testing older versions of browsers I would use MultipleIEs (http://tredosoft.com/Multiple_IE). But the problem was that this program would not run properly on Vista. So I began searching for another option to test an older version of IE. Well for this I found a solution in software from Microsoft (for free). They have a virtual machine called virtualPC (http://www.microsoft.com/windows/downloads/virtualpc/default.mspx) and with that they have a available image which is valid till January first at http://go.microsoft.com/fwlink/?LinkId=70868. After this period I don’t know what Microsoft will do. We will see.