Generally IOPs no little to nothing about DID other than get freaked out. My therapist did know some, but was not helpful. Those classes can be found in any self help book or Cognitive Behavioral therapy work book.
I wouldn't be open in groups about DID unless you have a swap put moment you feel you need to explain or it comes up in talk with a therapist in group. I felt pretty alienated after it came out in mine- someone said "that really put things in perspective for me; I mean, I thought I had problems, but compared to that, you know, I'm fine." Ugh. Mortified. But I tried to make me normal for him (and everyone) by saying a part of me resonates with your addictive tendencies. And to another woman, saying a part of me resonates with the urge to binge. But I felt like I totally stuck out after that.