Is it the morph or the mats you can't figure out how to apply? The Mat is easy. If you have the body texture painted and saved to a folder. Open the original mat with wordpad/notepad/whatever you use. Scroll till you find your first line that uses the body jpg. Out line it, then Edit>Replace. Write in the new body jpg and hit Replace All. Save as new name, you don't want to loss the original. Better if you put the new texture in the same folder as the old one. You won't have to change the path, just the tex name. If the morph, what nickedshield said.