Myrna,
Thanks for the compliment! Why are using using a URN-based solution? If you simply publish the form template into a shared network folder, you should be able to point users to the template via normal conventions, such as \\server\forms\MyTemplate.xsn . I'm not sure how you could do this with a URN-based solution unless the form was installed on each user's computer. One HowTo you might want to take a look at is this one:
http://infopathdev.com/howto/tutorials/default.aspx?i=fd7c86608b4344eaa46ac6a2829136b1http://infopathdev.com/howto/tutorials/default.aspx?s=E-Mail
Sorry if I don't know too much about this subject, I haven't worked with it much! Good luck!
Matt Faus / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge