ie6 on win 7
Microsoft Expression Web SuperPreview for Windows Internet Explorer
Expression Web SuperPreview for Internet Explorer is a visual debugging tool that makes it easier to migrate your web sites from Internet Explorer 6 to Internet Explorer 7 or 8.
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=8e6ac106-525d-45d0-84db-dccff3fae677&displaylang=en