public bool AddMenuItem(MenuItem mitem,
	string menuItemNameToFind,
	string menuItemTextToFind,
	AddMenuItemModes addMode)

mitem
The menu item to insert

menuItemNameToFind
Name of the main menuitem element to insert before or after - find in MainWindow.xaml or with Debug Tools

menuItemTextToFind
Text of the menuitem element to insert bfore or after (use if there's is no explicit Name for the item). Note: Menu text must include any mnemonics that might be used in the menu item's text

addMode
Determines where the item is to be inserted