tutorial to customize advancetop menu prestashop

I have already installed "advanced top meu" on my prestahop with theme xdefault, version 1.5.4.1 . I am attaching an image of the appearance of my control panel. As you can see from here [login to view URL] somebody helped me adding a "First Menu" with three columns. I need a small tutorial that guide me how to add more menus "second drop down menu, third drop down menu, etc" , with its columns, products,etc