Probably the simplest way to do what you want would be to edit a copy of the CR2 and strip out all information on the body parts you don't want (i.e. all but the head, eyeballs, eyebrows, tongue and neck if you want it).
V4's CR2 is quite small now that the morphs are called in via readScripts, so you shouldn't have trouble doing the necessary editing using WordPad or whatever your preferred editor is (i.e. anything but NotePad).