Removing red error text...

Hello.

Does anybody know an addon, or otherwise that will completly remove the red error text in the top/middle of the WoW screen? Im talking about the "Ability is not ready yet" "Not enough rage" "Not enough mana" etc.

Im NOT talking about the sound, as i already turned that off. But im wondering if anyone knows an addon that removes the WHOLE TEXT from the screen.

Thanks in advance :-)