Since the Genesis figure has too low a poly count to render well in Poser, I verified that you can fairly easily get a rigged subdivided/higher poly count version of Genesis into Poser that will take V4 poses and skins.

To do this, follow the usual DS steps to export a .cr2 for Genesis with the V4 uvs (including exporting the base Genesis as a .obj with subd set to 0. Then export the morphed version that you want to use as a .obj with the subdivisions set to 1. The result is a mesh that has 75,488 polygons.

In PoserPro 2012, import the subdivided obj and go to the setup room. Drag and drop the cr2 onto the subd mesh, answer no to the grouping question, and all of the rigging and weightmaps will be transfered to the subd mesh, which turns it into a fully rigged character. The big issue is that Poser does not do a good job of interpolating the weightmaps, so the bends look a bit lumpy. Smoothing them out should be much faster than doing them from scratch.

Any desired morphs would have to be exported from DS as morphed versions of the subd .obj and then turned into morphs in Poser.

It's too bad Daz doesn't do this (with weights optimized for poser and the full morph set), it is very straight forward, just time consuming.