You seem to have it sorted out, which is good. There's often some well hidden trick involved when trying to group in a Poser friendly manner in one's modelling app. Eventually you find a way that works for you and stick to it, mainly in terror of what might happen if you were to stray from the path. :) My well trodden path involves markdc's Auto Group Editor, and/or UVMapper. I never group within Poser, I've heard too many users griping about it...