This is brilliant! Last week I eventually gave in and accepted the update to Internet Explorer 7 on my last development PC. I had been keeping IE6 around so that I could test on it’s broken-but-still-common behavior.
I still need to test on IE6, though, so I was resigned to either installing a fresh version of Windows XP on an old PC, or setting up a virtual machine image. However, it looks like I won’t need to do that after all.
Yousif at tredosoft has put together a simple installer which lets anyone run a whole bunch of IE versions on the same box. Excellent!