Air - Hide the Menubar

Hi
I’m making a lobby application (for one machine only) (mac), all it does is randomize flash,images and movies. Due to the crazy frameratedrop on fullscreen I’ve decided to just make the application the same dimensions as the system window. Only problem is that i can’t manage to remove the system menubar,

I’ve tried:
http://hints.macworld.com/article.php?story=20070118003804854
Which only hid it for about one frame and then made it visible again.

Haven’t found any plugins either that does the trick.
I’d like your 2 cents on this.

/ A