Run Multiple Versions of Internet Explorer AT THE SAME TIME

Anyone who has been a web developer for any amount of time would understand how tricky it is to get web pages to render correctly on different browsers, especially when the user base has a varied installation of browsers.

Installing a new version of IE replaces the previous version, so this is not encouraging at all for the adventurous (of which developers by nature are) who like to install cutting edge versions of software to test drive.

I've just thought about this problem myself, and viola, it turns out that I am too late! The problem has already been solved.

Here's a quote from TredoSoft:

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.

Get the Multiple IE installer.