It appears this product won't work with V4M4 skeletons: http://www.daz3d.com/shop/bonez/
Depending on how it works it either calls the V3 or M3 OBJ by name or it checks for that item's presence. I think the V4/m4 mesh is the same so it may work, to an extent, if you manually copy the morph deltas and attendant properties into a copy of the appropriate fourth generation CR2, but I wouldn't fancy trying it - nor would I vouch for the results.
Ty Richard. I might try it if I didn't have so much on my plate that I want to do atm already.