http://www.iis.net/downloads/default.aspx?tabid=34&g=6&i=1866
If you carefully take a look at the download pages like this one, you will notice that Microsoft offers more than forum based support for most of these IIS add-ons shipped by us (plus Email, Phone, Knowledge base).
So if you already have support contract with Microsoft, don't hesitate to open a case via http://support.microsoft.com or our support hot line. Even if you don't, you will find from our support portal related instructions on how to get assistance.
Regards,