Install Multiple Internet Explorer Versions
If you are a Web developer looking to test your site or are simply a user needing a specific Internet Explorer (IE) version, you probably know that Microsoft doesn’t let you install multiple IE versions at once.
However, people have made modifications to the IE versions, turning them into standalone programs that can be installed with the others, such as the Internet Explorer Collection.
Plus there are tester browsers, such as IETester, that emulate the different IE versions.
Eric Geier is an author of many wireless networking and computing books including Home Networking All-in-One Desk Reference For Dummies (Wiley 2008) and 100 Things You Need to Know about Upgrading to Windows Vista (Que 2007).