View your page in multiple versions of IE side-by-side
blogs.msdn.com
blogs.msdn.com
Hands down the best solution is to load up a single Windows VM and install a bunch of these standalone, sandboxed browsers from Xenocode: http://www.xenocode.com/browsers/
You can test across IE, Firefox, Chrome, and Safari versions.
So really, it's a 250MB trial to test IE6. But not really test IE6. Just render images from IE6. Unacceptably slowly.
Sometimes it boggles my mind that software can be written this badly. I think this is a new low, even for Microsoft.
It hasn't been updated in a while, I really only use it to be able to run IE6 alongside IE7 (which i have installed in the normal way) for testing purposes.
I run one VirtualBox instance on my Mac which allows me to test in IE6/ 7 and 8.
Is this using some kind of online, BrowserShots-like service? I was expecting that it would have some specially-packaged internal version of IE6 inside of it, so that you would be using two local browsers that download the content through some kind of tee-like HTTP proxy (that is, everything downloaded once, and then sent to both browsers).
It's a surprisingly underappreciated option.