When you need to test a web page with multiple browsers in order to get the page rendering the same, there are some limitations. Normally, there can be only one installed version of Internet Explorer on one PC.
But there are some different ways of having multiple Internet Explorer versions on one PC. The easy way is getting “standalone” Internet Explorer files. You can get different IE versions from following web site (unofficial, of course) and put them in their own directories and run as you need.