Over at my other site, www.globaltraumarecovery.org, we now have part II of Dr. Langberg’s talk (March 2013) on dissociation. This video covers the concepts of Dissociative Identity Disorder (DID) and complex trauma. She ends with 10 principles and cautions for therapists working with clients who dissociate and/or who present with alternate personalities and identities.
Check out the video here. If you missed the first video or want to find other free resources, click around on that website.
Musings on Faith and Psychology 
An excellent overview of DID. I especially appreciated the principles during the final 1/2 hour of the part 2 lecture. Always good to remember the redeeming work of God in a cursed world. Thank you for posting.