Gnome 2 menus - not the obvious question

[Todd Pytel <tppytel@sophrosune.org>]

I know how menu editing does (or rather doesn't) work in Gnome 2 -
vfolders, desktop files, and all that.  What I can't figure out is what
defines the main menu itself. That is, when I click the foot, I see
Applications, Debian Menu, KDE Menu, Run Program, etc. What defines that
top-level menu? The vfolders directories only contain the definitions
for Applications, Preferences, and other xxx:/// locations, not the main
menu definition itself.

Thanks,
Todd