Ok.
Find the file that you want to use for your texture.
Go to the toribash folder on your comp.
Go to custom
Find your name
Put the file in that folder
Depends what it is. Name it like this:
head texture = head
Left Pecs = l_pecs
Right Biceps = r_biceps
Stomach = stomach
chest = chest
groin = groin
left foot = l_foot
right hand = r_hand
Get the picture? NOW DO IT!