Neat application - IE Tester
 

With this program you can test all common IE versions! So, there's no need to install those crappy browsers anymore. Just install this app!

http://www.my-debugbar.com/wiki/IETester/HomePage

Thanks for this :-) Although I've just about abandoned checking for compatibility issues in IE versions below 7.0.

Given that around 35% of users are still on IE6, it's really not a good idea to ignore it.
http://www.thecounter.com/stats/2008...er/browser.php
Try telling a client that 35% of his site's visitors might have problems, as you haven't bothered to check something in the second most used browser in the world, with more users than all the ones with less users combined!
You can't go by the web stats for a techie forum like this, of course, as most techie types do not use IE6.