Take an OBJ with the same polygons as Genesis but a new uv layout, in the Surface palette option menu Load new UV set... and select the OBJ. This is the same as in DS3. As with DS3, you need Morph Loader to import a new shape as a morph - and as before the mesh has to match in vertex count and order. Again, this hasn't changed though with the new rigging tools you do have the option to adjust the joint centres - there is draft documentation for the CCTs, if you have them, here http://wiki.daz3d.com/doku.php/wiki/software/dazstudio/4/userguide/plugins/cct/start