Microsoft auto updating can be quite annoying for us web developers.. A large amount of users still use IE6 (some even use IE 5/5.5) and after IE7 is (automatically) installed for you, you can't test your websites using olders browsers anymore. At least, not without a little effort. Luckily Yousif has created this amazing package called Multple IE, that actually installs Internet Explorer versions 3, 4, 5, 5.5, and 6 as standalone applications! It creates shortcuts for the chosen versions (you can configure which versions to install) which is truly great! A must have for web developer's, I'd say. Right now I've tested version 5, 5.5 and 6 in Windows XP SP2 and they work fine.