We have heard tons of feedback about the need for developers to run both IE6 and IE7 on their machine simultaneously to test Web sites. The challenge is that when you install IE7 it replaces IE6. To date we have not had a supported way of handling this although there have been myriad hack ways of accomplishing this task. To resolve this Pete LePage set out on a quest to figure out an easy, free, and correct way to do this.
Running IE6 & IE7 on one machine, the right way