menu removeItemAtIndex: 2. "remove Edit menu item" => ok
menu addItemWithTitle: 'Quit' asNSString autorelease
action: #terminate: asObjectiveCSelector
keyEquivalent: 'q' asNSString autorelease. => does not work
#NSMenu inObjectiveC setMenuBarVisible: 0.
#NSMenu inObjectiveC setMenuBarVisible: true asAlien.
Probably I did not succeed probably because I do not know enough on OS X app dev.
It could be an option, but I still think that it would be bettter to be able to customize this static information in the nib file.