[AccessD] Access 2007 Navigation bar

Can anyone point me at a tutorial or sample code or something that
illustrates how to customize the navigation bar? I don't find the list of
tables and forms and reports particularly useful, except in terms of
development. I have more in mind a sort of hierarchical series, vaguely like
the classic switchboard technology but much more useful. Something along the
lines of:

Customers
   Browse Customers
   New Customer
   Print Customer Labels
   Top Ten Customers
   Email selected Customers

Products
   ...
   ...

etc.

TIA,
Arthur