I'm not sure about the definition of "cpn."
I believe DBT can be used for other populations. In fact, I spent a good year of my life modifying the curriculum for another population. Spent some time testing it and hope to present soon.
As you likely know, the core components of DBT stem from well-used treatment methodologies... so it isn't exactly a stretch to say that their derivation could work outside of borderlines as well.
The DBT curriculum has also been modified for use with children/adolescents and that professor now presents her stuff in training sessions.
I don't like to self-identify so I won't go into anymore details publicly, but if you'd like the specifics of my research, I can share a few with you. Not necessarily what I did/do... but what I learned about other populations, studies, etc.
You seem to have a great curiosity... that's a wonderful gift. I have the same itches to learn sometimes. I've really been able to keep up with all of the changes by going directly to the literature any time I had the questions start to pop up. It's fascinating reading... sometimes. Ha.
Hope you are well.