I cannot get this to work, I beleive the error maybe the fact that I cannot use the notifier class with my script because of illegal access - what I have done is changed the template file which deals with user registration and redirected to my websites registration form and duplicated the zen cart process there during a sign up.

Really anoying but you cant have everything you want and must adapt. Someone from the development team should really look into this as it is a much wanted feature.