Thanks, SearchGalRequest worked. I didn't try that as I didn't really think of doing a search, and there is hardly any documentation on that function on soap.txt. Maybe something more descriptive could be added in the future.
Speaking of that, if we do end up implementing Zimbra here, I will probably get involved in development. The first thing I would like to do is create some nice HTML browseable documentation for all the SOAP functions in a javadoc-like format
Thanks again for your response, you solved my problem.
-Christian