Dear Sondra,
Create dynamically a user is dangerous and I don't want to include such functionality that could be used by hacker to try access to the administration of a website.
If you want that we develop such kind of functionality specifically for you, of course we are ready to do it.
You can use our billable support for such kind of thing
www.jms2win.com/download?page=shop.produ...35&category_id=1
Concerning the possibity to directly go in the "add form" without display the "list of site" is something that could be added in standard in JMS and is a good idea.