... huh. I don't know about hacking the "I", all I've seen suggested is regular meditation and visualization. Still, interesting stuff for occult buffs.

Also, I think I've seen accounts of people creating two or three tulpas (tulpae?), with no indication that this was any different to the fist; does this square with the left-brain/right-brain bit?

EDIT: I just realized I immediately read a comment with WARNING MEMETIC HAZARD at the top. Hum.