H. Charles Berner's "Manual for guiding a person through the after death experience"-
http://www.charlesberner.org/Tibet_Book_Dead_web.pdf, although somewhat poetic, gives quite a good account of the sequence of the "after death experience". During regressions people go through the upsets (of separations), problems, done/not done, then dichotomies of good/bad, love/hate, ..., you name it, of the life they leave behind, and the energy fields (colors, sounds, emotions, ...) manifest as the person releases from them and from that maze called the mind which contains identities, guides, entities, etc, some hostile, some helpfull. It's very interesting actually.