Wow, Andy, I like that idea. I've just barely begun using EFT, and had great success on a lifelong phobia. I have played with it on weight, but not enough.
Ludlow, I've been studying Field Theory -
the field center - to me it's the next logical step from Abe's teachings, and that helps me with this. Everything happening externally is a metaphor for your identity, so to change your manifestations (and in the process, your beliefs), you would assume the identity of the person in possession of that which you desire.
So, you want to install your belief in LoA. What is a person who believes in LoA like? Someone happy all the time, someone abundant, drawing happy abundant people to him/her. Someone successful and fulfilled in their highest purpose. Someone inspiring to others.
What does that person believe? That focusing on good brings more good; that good is everywhere; that we are all just trying to feel better; that "the better it gets, the better it gets" (Esther/Abe);
blah, blah, blah, I imagine all you objectivists are ready to puke by now! 
(Where are the puking smilies when you need them?!)
So, if you can have a nice daydream/meditation and assume the identity of that LoA-believing person, imagine those qualities applying to you, see yourself that way, does that give you any hint of a shift?
Well, it works for me, anyway.
Love & Joy