bill, ISTR one of the developers explained what the mapper function was (can't find the forum post, of course), and it pertained to some script or menu function that was not successfully integrated into poser IIRC.  something like cage's poser uvmapping script in their python forum here.  the camera-mapping (perspective UVs) thing is the main mapping tool now.  this may imply they won't be adding the mapper GUI to poser 8, either, hence stefan may not be able to say much.