If there isn't I would be willing to write up some documation but i am afraid that i do not know much about bml at the moment.
a few questions I have are:
what is the difference between a global.look file and a generic.look file. Browsing through the livejournal source I see things like PAGE listed twice each different though.
Is there a way to spesify what scheme is used in an actual bml file or does it have to be global and effect all files?