Even if you have Windows, sometimes you may be facing the same problem. You may need to check IE 6 , 7 , 8 . I used to work from GNU / Linux . But recently I came to a site which gives the live screenshots of the webpages in different operating systems with different browsers . This made me think how it works :) .

Yes its easy to implement it . You just need a Windows machine with IE6 , another with IE7 , and IE8 . So now it has 3 machines with 3 IE versions . You can either login to the other machine using the remote desktop and check the browser compatibility there .