Daz3D posted a youtube tutorial showing how to export Genesis from DS4 into P9/2012. However, once inside Poser, it no longer has the functionality of DS4 Genesis. Whether the weight mapping works, or would have to be redone in Poser, I'm not sure about, (weight mapping works differently between the two programs), but all the morphing and extreme figure shaping, texture conversion, etc,  that Genesis is capable of in DS4 goes away in Poser. You can still morph it, but you'll get a very stretched mesh if you do anything too extreme, so I really don't see the point in going to all the trouble of getting Genesis into Poser.