How to run IE3,IE4, IE5…IE6 on the same computer

By reading this ticket of Fred Cavazza I sart looking to the site free tools and I found what I seek for a long time: a simple way to run several versions of IE on my PC. It is important to have this fonctionality to make sure that Rialto is always compatible progressively with its evolution. A great cheer to Multiple IE installer. Only have to to validate the IE versions.