The problem is that what you want is different to the convention on most other DVDs. How could DVD Studio Pro guess that you want the remote to behave in an unconventional way?
Usually Menu means go to previous menu and return from that. And the Title button on the remote means go the root or main menu. How about just placing buttons for previous or main in each menu?
Anyway, you can make it work like you want to, by going to each track and menu, and set in each element's Inspector where the Menu button should go in each case. Be aware that you're going to confuse a lot of people with that.
Adolfo Rozenfeld
Buenos Aires - Argentina
www.adolforozenfeld.com