Willdial, what is the way you heard of to do it inside of Blacksmith? The projection brush would do it but it would take forever to do it correctly, because you would have to get every body part from every angle, and if one part is covering another part you'd have to remove it to get a good shot of the other part. If you have the Genesis 3 UVs for Genesis 2, and you can get the texture transfer brush to work, then you could transfer them to Genesis 2 and then convert them to M4, but the texture transfer brush does not work for me. :(
Did you mean one of those, or is there yet another way?