One of the best applications I've ever had the privelege of using was Tredosoft's MultipleIE application.
However, now that I'm using Windows 7, and that application was never ported to Windows 7, there does not appear to be a similar installable product available for testing pages in multiple versions of Internet Explorer.
Then along came Spoon.
However, they've pulled their Internet Explorer sandbox emulator due to a Microsoft cease and desist (WTF?)
So how do I test my web page designs in Internet Explorer 7 (I have Internet Explorer 8 installed), preferably via localhost?