honestly i would say no there is no easy way to do this, from how i have seen zbrush work when you have to start placing the model in the first place (disclaimer: i could be wrong here and if so someone will most likely come and correct me, but i think you are going to have to place each part manually using the akward (imho) move and scale tool). i would prob become really lazy at this point  and merge those suckers into one mesh before importing and leave some of the detailed parts as subtools