Ever wanted to test your website in various versions of Internet Explorer?
It is possible to run Internet Explorer in standalone mode without having to over-write previous versions.
Basically, Internet Explorer is run by exploiting a known workaround to DLL hell - which was introduced in Windows 2000 and later versions - called DLL redirection...
Download this Application
Start the Install, choose you version and off you go..

This is the application in action, here we see IE7 running IE6.....