And that's provided you still have DSON.  It is no longer available at Daz and there may have been a version that simply didn't work well.  Using P11 and P12 to import the Genesis figures is doable but you need to import them into P11 and save them as Nerd 3D posted.  You can go as far as Genesis 8, don't even attempt Genesis 9, that one is hopeless.