Hi Samuel,
Welcome to websitebaker. I can't give you an answer using show_menu because, well, I have never used it. Show_menu2 is now the standard as it offers much more flexibility and is included with every installation of websitebaker. I think you will be able to find what you are looking for by taking a look at the documentation and examples which are available from:
http://www.websitebakers.de/sm2/Hope this helps!
With warmest regards,
Michael Milette