Quote -  ok, So I am not 100% on this, but it is roughly how my friend Darrell explained it to me.
inside of 3d studio max I would add this new mesh as a morph target to the original head mesh, add a subdivision layer to it then bring the high res mesh and use the skin wrap modifier to wrap the high res to the low res mesh.

does that make sense? 

Kind of and I have Max. Can't try it out right now but hopefully tomorrow sometime. I'll post my results. Sorry trying to finish a project for a client.

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