What do you mean - you want to keep morphs on the head that are currently 0? All I can suggest is that you set them to some extreme value and then rezero them in the destination application. And for the body morphs, you want to replace all the morphs applied with a single morph? Do you have the MorphLoader plugin? If so you could hide all but one part, export as OBJ, and impoprt as a morph for that part - zero morphs on everything bu the head, set the imported morphs to 1.