I've been vaguely poking around for something that will allow me to run IE6 and IE7 side by side for a while now. The MS approved solution is to download Virtual PC and then a PC image. They supply both for free but the image takes up 1.5gig of hard disk space! That seemed crazy-wrong to me so I kept looking, and finally, today, I found it. Install multiple stanalone versions of IE on your PC - everything from IE3 to IE6. Seriously, web design gold dust, as far as I'm concerned. I'm running IE6 on my other monitor right now, looking at the display bug in my work website. It needs a tweak to work with conditional comments but that's not much to ask.