Not sure if I can answer this fully for you, but a few pointers for you: a morph is basically a deformed mesh, manipulated from one form to another. The starting mesh and the end mesh are basically the same mesh, but altered (stretched, manipulated in an outside program, Zbrush for example). If from what I read in your post you want to morph from the skeleton to a human (default poser figures?). If so, no it cant be done as each mesh is different (different number of faces, vertices, topology etc). You could, in theory, take a human and create a morph (altering its underlying mesh) to make it moreskeletal, maybe to the point of a dessicated corpse perhaps, but not to a full skeleton Im afraid.