Hate to just jump in here without really answering your question, but my guess is that you really need to adjust the rear brakes, not the parking brake. Those self-adjusting mechanisms rarely work well, even on Hondas (my experience with 3 Accords with rear drums), and usually by adjusting the rear brakes properly your parking brake works with only 2 to 4 clicks. In any case, I am sure one of the tech gurus here will jump in with the actual parking brake adjustment procedure. Be sure, though, to make sure your rear shoes are adjusted properly first.
As I just posted on another topic in this section today, I once had a Honda dealer who would do this as part of the x7500 services. Ah, those good ole days...