are you sure the hair is a prop. Some Poser hair is actually a conforming figure .

Replacing the head with the hair would not be a suitable option even if it worked .

What I do in Lightwave is pose the figure with hair and clothes and export the whole thing as 1 object. It cant be altered but thats normally ok for me since I am just rendering .

I would post this in the C4d forum (if there is one ) as an interposer question . or site mail koryume dirst, he has some tutorials on his website .