On the suggestion of Xanth, I wrote a post on my blog pertaining to "The Shadow Self".
http://nonphysical.wordpress.com/2010/10/14/deep-dark-devilish-shadow/ (http://nonphysical.wordpress.com/2010/10/14/deep-dark-devilish-shadow/)
This is the introduction to the topic. I will write at least a second post pertaining to the role of the Shadow Self in astral projection and self-analysis.