How to add another additional menu in the backend ?

[jazclick]

I want to add additional menu in the backend ? What is the directory of the topmenu.

Example:
Catalog | Sales | Design | Extensions | System | Report | Help | SocialMedia

The new menu is : SocialMedia

I want to add scripts.

[abantecart]

http://forum.abantecart.com/index.php/topic,1102.msg4270.html