Hiding cgi-name in URL?

Hi there,

I run a MoinMoin wiki on an IIS6 / Windows Server 2003. I would like to
hide the CGI in URLs. According to

http://groups.google.co.uk/group/com...6c7fec5e5c0e30

I listed the cgi file as default index of the site, which works well.
But trying to reach a specific page fails.

http://server/wikisite --> front page. OK
http://server/wikisite/PageName --> fails with 404 page not found
http://server/wikisite/moin.cgi/PageName --> works, but I would like to
hide the CGI

I would be pleased if somebody gave me an advice or a pointer to solve
this.

Thanks in advance!

Cz.