Using IE6 and IE7 to test web applications
Since the release of Microsoft Internet Explorer 7 many web developers need to test their applications in IE6 and in IE7. There are several ways to accomplish this.
You can use two separate machines. Tor prevent one machine from upgrading automatically you can install Microsoft's Internet Explorer 7 Blocker Toolkit (which also includes a template for group policies) or you can set the DWORD registry key DoNotAllowIE70 in
to 1 on single machines.
You may also want to install IE6 and IE7 in parallel which is described in Manfred Staudinger's article Taming Your Multiple IE Standalones (which I haven't tried yet).
The solution Microsoft offers is a Virtual PC image (Internet Explorer 6 Application Compatibility VPC Image) containing a pre-activated Windows XP SP2, IE6 and the IE7 readiness toolkit. The image expires on April 1st, 2007 but that leaves at least some time for us developers.