I think The Guitar of RT- about the songs is the site you mean, Malcolm- I just happened to have it to hand!

Unusually, he seems to have given some more info on meaning here. Relevant bit:

Crazy man Michael-Melody by Swarbrick, lyrics by RT. A song steeped in the imagery of roses growing from the breasts of dead lovers. CMM inadvertently kills his own true love and is forever condemned to wander the earth, shunned by human society. Able to communicate only with animals. Talking to Flypaper's Frank Kornelussen in 1984, Thompson admitted the song was about Jeannie really. "CMM is kind of guilt, because in some way I feel responsible for her dying. There wasn't any way I was, but I just felt that at the time." (Extract from RT Biography)

Lots of guitar tabs are there but not CMM as far as I can tell.

Noreen