This does require the use of Cheat Engine, but Cheat engine
CAN NOT be running while you are in game. Try this on a trial account first if you like.
(Link to cheat engine provided by relz)
I had process guard running at the time but I don't think it matters.
-step1) open WoW
-step2) open Cheat Engine
-step3) make sure Cheat Engine is set up correctly, a guide on how to do so can be found elsewhere
-step4) click on "manually add address." change the code to 80DFFC (as of this patch). Click OK. Now double click on the value and change it to 0.
-step5) exit out of cheat engine "YOU
MUST DO THIS OR YOU WILL BE BANNED!"
-step6) log on to your character, and try it out. there is a slight chance you may get disconnected, but don't worry your account has not been banned you have just been disconnected. log back on.
I AM NOT RESPONSIBLE FOR ANY **** THAT MIGHT HAPPEN. TEST THIS ON A TRIAL ACCOUNT FIRST OR WAIT FOR OTHER PEOPLE'S APPROVAL!!!