There's a lot of good Culter information on the internet--there's even a Curezone forum dedicated to his protocol--and he's written two books. I'd highly recommend that you read as much as you can so that you are informed and not relying solely on Dr. B., particularly if he's not familiar with the protocol. And I'd say if he told you metals are not a problem solely because they didn't show up high on your hair test that he isn't familiar with Cutler's extensive work.
I've been doing a lot of reading about it over the past several months, but I haven't started chelating yet (trying to get adequate adrenal support first). I believe Newport is very familiar with the Cutler protocol and could point you in the right direction if need be.