Multiplicity and theories of multiple selves

[silence1986.livejournal.com]

How does multiplicity, in your opinions, relate to theories of having multiple selves, like Transactional Analysis, Voice Dialogue (Hal and Sidra Stone's theory) or Psychosynthesis? Are people who follow psychosytnhesis, voice dialogue etc. in therapy or the like substantially different from multiples or is it part of the continuum? Can multiples use these theories to understand their systems better? I, for example, feel that these theories are rigid and my system doesn't conform to them - beyond being much more formed than simple "ego states" -, but they do make sense in some ways in clarifying my system. I, by the way, am only mid-continuum at most.