Making a scar on one side is really easy actually sahale. Just create two pictures, one with a scar, one with out, and go into your feral heart folder then my_presets. Find the preset number you want, then open the MATERIAL file in notepad (right click and open with) then scroll through and look through for the appropriate body part. When you find the right side of the face, or body or such, just change where it says preset_7body.jpg or whatever to whatever you named the extra side, and save! And tada, a two sided preset!