I've noticed that some people in rendering combine parts from more than 1 charcter or poser model in order to get their ideal character sometim.

How do you go about doing that?

I would like to borrow parts of skin mats sometimes from one model and add to another.

What I'm thinking about at the moment is the pubic hair from one custom poser model or character and adding it to my own custom V4. How would I go about doing that?

I don't need or want the other model's skin mat which may be too dark or light, just the pubic hair that comes with it. What's the best way to do that?