How can you change your photo in a text convo on the LG EnV Touch?

On the LG EnV Touch, you can keep a log of all of the text messages you have sent and received from different people. I was wondering if there was a way to put a picture in the place where it says ';Me';. I have been able to change the pictures for other people, just not my own. Any ideas?How can you change your photo in a text convo on the LG EnV Touch?
open your phones internal keypad, go to contacts, scroll with the up arrow until u land on ';my name card'; go to edit. scroll down to picture, hit set, it should take you to your pictures and select the one you want, after that follow the instructions.