Alright. If you want the sides to be different, save the side that you want on the left as 'preset_#body(or head, tail or eye)l' Make sure you have l or L at the end. Do the same with the right side. 'preset_#body(head, tail, or eye)r' r or R.
I'll show you with body. After saving the left side as 'preset_#bodyl', go into the material file and find material preset_#_bodyMatL. When you see 'texture preset_#body', all you have to do is place an l, or L, at the end of the 'body'. Do the same with the right side. Place an r, or R, at the end of 'body' when you find material preset_#_bodyMatR.
Easy enough? If not, I can take pics to help you.