How to edit the Foot Menu?

[Todd Pytel <tppytel sophrosune org>]

I recognize that menu-editing in GNOME 2 is not exactly pretty, and I
don't expect a user-friendly solution.  But I cannot for the life of me
figure out where the MAIN menu (NOT Applications) is defined.  Somehow
this is tweakable - RH's foot menu contains all the categories "inline",
while Debian's has "Applications", "Debian Menu", and "KDE Menu"
subfolders.  How is this accomplished?

Thanks,
Todd