How to use multiple styles for Nice Menus?
Each Nice Menu can be addressed in CSS using its name. For example I have a Nice Menu called "Product Menu" and by looking at the html of my page I can see that my menu has the following classes

nice-menu
nice-menu-right
nice-menu-menu-product-menu
etc..


You can use the nice-menu class for all Nice Menus, the nice-menu-right class is the type of menu it is set as (Right, Left, etc.). You can also customize each menu individually by addressing it in CSS using the nice-menu-menu-MENU-NAME