Force image to download in Classic ASP on IIS

We have used [login to view URL] for forcing a file to download instead of opening in our web sites - and this has worked great on our IIS 6 servers - but we just changed one of our servers to IIS7 and now this code that we have been using will no longer work. Looking for a solution that will work in Classic ASP web page on IIS7 to have a download link for different types of files (pdf - images - mp3's - etc ) and force the download or open function in browser. This must work for all browsers also.