Thanks for the tip about tile molester but i have another problem.
I finaaly found the backsprite and edited but when it tested it out all the colors where changed the colors were from the front trainersprite, i though if i changed the color everythings gonna be ok but i was wrong, de colors that i changed (like red into purple) wheren't changed at all. Can you tell me how you changed the colors on tile molester, help me fix this problem