doing what ravi wants (applying an undistorted label map to a morphed, wrinkled paper surface) is easy in poser anyway.  just morph and wrinkle it as desired, then load as background image the label in question and line up the bag surface so that the label is correctly aligned with respect to the bag in front of it.  then "create perspective UVs", which changes the bag's mapping to match the label.  in other apps it's called "camera mapping".  i dunno how to do it in carrara, but it must be at least as easy as poser.