To create loops you need to look at spinquad.  It requires two adjacent polygons selected.  Its easier to try it than explain   :)

You can make a blank cr2 to use as the donor , then you dont need to rig at all. Just group your geometry and replace the obj file in the Blank cr2 with your geometry file name.   

You could clean up the top bit by some careful deletions and welds , but since its working move on .