I am DID You can find MY experiences and so on in my blog
This link will bring you to one of my blog entries which has a second purpose explaining how to locate the members blogs in general.
PLEASE READ WITH CARE
this blog is MY experiences and MY therapy program and MY research that has been apart of my therapy program. If your friend does not have these experiences that is OK.
http://myself.psychcentral.net/2006/...ate-the-blogs/
As for how you can best help your friend. Just continue treating him as a friend and continue being a friend. He will let you know when there is anything you can do to help him and what he needs from you.