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 thanks to Joe Maddalone who came up with a way of achieving that in November 2003. 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.
There is an installer available that will install IE3 IE4.01 IE5 IE5.5 and IE6 and allow you to run them on the same machine at the same time.