Run IE6, 7 and 8 on the same machine

Note to self:

http://blog.case.edu/jeremy.smith/2008/03/07/ie_6_7_and_8_running_on_same_machine

Presumably it will still work with the final version of IE8 when it gets released.

(As as aside, I've been using Tredosoft's MultipleIEs for a couple of years now and it works pretty much flawlessly. Extremely handy for testing purposes.)