Make sure you've turned the name stealer off in the settings first. Then join a game on your account, and open the command line (press tidle). In the command line type "/name Bounce41" without the quotation marks (Bounce41 can be any name you wish). You can do this as many times as you wish.
On a side note : Be careful. If you ever type a smiley like or into the ingame chat box, it will enable name stealer. If you do this by accident, just turn it off in the settings file, re-join the game, and change your name back.