It sounds to me like one of your problems "you can only see the inside of the model" is reversed normals. Try importing the obj with the "Flip normals" box (only) ticked in the import options. Then re-export the obj again. "Like I wanted to make the dolphins pectoral fins longer, and it screwed up the side of the body as well." You should be able to do this with magnets, then spawn a morph target. There are some tutorials on "Morphing With Magnets" at Poser World. http://www.morphworld30.com/tutor.html