Interesting.  What I did do is parent the P5 neck to the P7 neck.  So now I have a P7 body with the P5 head. Of course I am making the P5 body invisible. And because he's wearing a turtleneck - it covers up the seams but I matched them pretty well and you can't tell.

The reason I did this was I wanted to have a more pear shaped body with the FBMs available with Simon.  They aren't there for P5 Don. 

This is for an animation so as I import BVH files in they will be applied to the Simon body.  A lot or trouble in a way but I wish there were a more seamless way of doing this with the CR2 file. That would be nice.

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor