multiple versions of IE is a post on The Hickensian

Everyone’s linking to this, and normally I stay away from repetition of other blogs, but this is far too useful.

As you all know, one of the biggest problems with testing sites on a PC, is that Windows only allows one installation of IE. However, a recent tutorial explained how the patent-friendly version of IE 6 inadvertently provided a way around this. By altering the installation files for IE 5 and 5.5, you could have the 3 last versions of IE on the same PC!

So here comes the really useful bit. Ryan Parman has done the work for you and created standalone versions of IE 5 and 5.5 ready to download. Get them while you can, they may not be up for long.