Internet Explorer 6 and Internet Explorer 7 on same computer for debugging [duplicate]

Answer 1

Use Spoon (was Xenocode)... http://spoon.net/browsers/

It will let you startup any number of different browsers in a sandbox from within your browser.

The advantage:

1. You don't have to install any virtual machines.
2. You don't have to rely on apps like IE Tester and can instead use the actual browsers.