Fullscreen as default?

Take a look at:
Download and unzip the module and move it to brl.mod, rebuild all modules.

http://www.macsven.de/macoslsui.html

OSSetSystemUIMode:Int(KIMode:Int,KIOption:Int)

kUIModeNormal
kUIModeContentSuppressed
kUIModeContentHidden
kUIModeAllSuppressed
kUIModeAllHidden

kUIOptionAutoShowMenuBar
kUIOptionDisableAppleMenu
kUIOptionDisableProcessSwitch
kUIOptionDisableForceQuit
kUIOptionDisableSessionTerminate
kUIOptionDisableHide

Try it and let me know if it work's for you?