As many of you know, IE6 is an outdated browser that interprets websites in mysterious ways. It more or less forces us developers to add redundant code to our websites so IE6-users won’t lack user-experience. IE6 is also less secure than modern browsers and if you still use it as your main browser we strongly recommend you to update as soon as possible (see list of more suitable browsers below). Unfortunately there are still many people out there who use IE6 which in most cases mean that we need to test our websites in that browser. This is where IETester come in handy.
You can download IETester at http://www.my-debugbar.com/wiki/IETester/HomePage
What do I do if I can’t see flash on my site with IETester?:
We’ve noticed that if you run Vista on your machine you must run IETester as administrator to be able to view flash.