>The installation works fine. I also register again the WS just in case it needed to be reset. I don't know much more than that. It still bugs me that this isn't supported natively as this was released a year ago.

It goes further than only installing the add-in. Take a look at:
http://www.ftponline.com/xmlmag/2003_04/online/xml_wahlin_04_04_03/