That looks like an interesting slide presentation (I was unable to read it well because the print was so small), and it looks like it is about the inner family systems model? Different parts play different roles, such as protectors/guardians, young and vulnerable parts, etc. This is a model that appeals to me too and helps me think about my different parts. My parts are ego states rather than the full-fledged alters of DID. (i.e. Mine never "take over" but sometimes I share consciousness.) One thing I liked about this slide presentation is that it tells how to "interview" your parts. Sometimes I have wanted a more consistent way of contacting them but haven't found one. This interview technique sounds promising and I might like to try it. If anyone can figure out how to make the slides larger so that I can read them, please let me know.