Hi
I have a 14 yr old who has had asthma from being a baby. Firstly, dump the Doc. and get a new one. My son has to take Prednislone occasionally, for 5 day bursts if he is really bad. I don't like him taking it but know it can be a life-saver, and he has not had any ill-effects from it. It's unbelievable that the Doc did not even give dosage instructions, however going on what you have said he probably doesn't need it. They don't know if he needs it when he has not even tried the Pulmicort yet.
If your son needs albuterol every day, then he probably needs to be taking the Pulmicort. I know how you feel about it, I went thru the same emotions when my boy was small, but inhaled steroids have very little effect on the rest of the body, they go straight to the lungs where needed, so smaller doses are given as opposed to oral steroids. I have also heard the stories about stunted growth, but the doses would have to be massive. If this is reassuring, my son has been on them since he was 3, he's now almost 15 and approaching 6ft in height!
Good luck with the new Doc!

Mandy.