I've tried using the Genesis add on for WW2 (both the plugin and stand alone versions rather than the one that comes with Poser) without much success. I even tried using the G2F mesh in place of the Genesis obj in the directions. The conversions were so so at best so I just gave up on the idea. G2 and G3 may have origins in the Genesis mesh but they are not the same. It's like saying just because the Hivewire Horse and Dawn have origins the same mesh, Harry can wear Dawn's clothing.