jQuery mega menu plugin Fast News Theme

Hello,
i am trying to make jQuery mega menu plugin (http://wordpress.org/plugins/jquery-mega-menu/) work with this theme (http://themeforest.net/item/flat-news-responsive-magazine-wordpress-theme/6000513)

But i can’t figure out how to set it up.
I need it to show a mega menu when the mouse is over a certain entry of my dropdown menu (the theme features it).

Any ideas?