Far as I know, rigging with the Poser "bone" system is still required. Maybe that will change in some future release of the program. Carrara will export a properly sliced mesh, however, and there are various tools that automate to some degree the basic work of getting a mesh rigged in Poser. The downside is that you have to use Poser's primitive system -- joint zones instead of vertex weighting, et al. And getting good results from the Poser rigging requires a fair amount of tweaking of joint parameters IN Poser.