Tohle nestačí?
http://superuser.com/questions/32327/how-can-i-ins tall-ie7-on-windows-7You can't install Internet Explorer 7 but you can run it inside Internet Explorer 8 (as the rendering engine is bundled) by doing the following:
1. Open IE8
2. Open >Tools >Developer Tools
3. Switch Browser Mode to IE7 and Document Mode to IE7