http://www.umediaserver.net/news.html

Something else to try instead of patching the server is installing software that takes the place of the software that is stripped out of the web edition.

The link above posts software compatible with windows (doesn't state with server 2003 web edition though) but it is worth a try.

Web Edition is really a ghettoed server... It's so stripped down that the basic function is as it states storing web files.

Designed for dedicated Web serving and hosting, Windows 2003, Web Edition, delivers a single-purpose solution for Internet service providers, application developers, and others who use or deploy specific Web functionality.
If you can afford it the standard or enterprise are much better suited to what you need. I know that doesn't help, but it is an alternative.