Just script your own chat bar.. its not that hard.
Stefan, you just need to make it so that you can disable default chat.
ChatBar.destroy() works but returns this error when the player first presses tab and the bar is destroyed:
NPC Code:
GraalScript: Function setSelection not found in script of StartScript_GraalGui
GraalScript: Function makeFirstResponder not found in script of StartScript_GraalGui