IE7 Preview for developers

Last 2 weeks I've tried to repair the css styles for a web app which must be opened with Internet Explorer 7.0

Now I use Windows 7 and IE10. So, for debug my webpage in IE7.0 I've used IETester.

Now, I founded a new app which is just trial for 60 days (unfortunatelly). This application is:
Microsoft Expression Web4 SuperPreview. I've downloaded from here:
http://www.microsoft.com/expression/try-it/Default.aspx

And looks like:

UPDATE: Now I can use this: http://browsershots.org/