Head Chams?

Is it possible to have a 3 colour cham?

body when behind wall (unshootable) = red
body when infront of wall (shootable) = green
head is always blue except when behind a wall?

Note: i have tryed that thing where u got to ur ca directory and put head.rez or whatever it is into a new folder, then the head turns white, well, it DOSE NOT WORK... i repeat: IT DOES NOT WORK.
it just freezes when u enetr a game for me..


Edit:
Wait wait wait, i just got an idea. what if we were to edit the character_head.rez and change the texture and make it all blue. would that work?

Just get an aimbot. Easy for me o.O