with the key on acc. and radio on, press and hold the mute button. turn key off. let go of mute button and press and hold the 1 button and turn key back to acc. now use the 3 and 4 buttons the change the first character, when you get the letter you want, press the 6 button, continue selecting letters you want and after you finish press and hold the 6 button to save message. You only have 60 sec. to enter letters but you can start over from the point you stopped at if it saves it in mid message. sounds alot harder than it is.