HI I WAS WONDERING IF THEIR WAS A WAY TO CREAT A AUTOEXEC PROGRAM ON THE TI-83 AND I NEED TO FIND OUT HOW TO LOCK THE PROGRAM SO NO ONE CAN EDIT IT MY NAME IS STEVE LORENZI PLEASE CAN YOU HELP ME OUT? I AM CREATING WINDOW'S 3.1. ON THE TI AND I NEED TO LOCK IT OUT. THANK YOU