Go to /common/menus/modnavmenu.php. Use that app to create a menu under a name. The menu is saved in the database.
Using Menus
To use a menu, include the file 'menu/makemenu.php'. There are 2 main functions: generateMenuFromFile("Left", "example.xml"); and generateMenu("Left", "/~rsingh");.
The generateMenuFromFile() function generates a menu from a file. The first argument is the type of menu to draw and the second is the file location. The generateMenu(); function loads and creates a menu from the database. The first argument is the type of menu to draw, default is 'TOP', and the second argument is the name of the menu. If the name is not given, it will try to match a menu based off of the uri.
Linking Menus
Linking to another menu is as if that menu existed at that spot. As if the link pointing node was removed and the menu it pointed to existed at that position.