I've often found the pope difficult to convict of Heresy for some reason....not quite sure why......

Do normal Catholic bishops increase Zeal? The only reason I ask is because I want to launch a crusade, but the only privince I have thats capable of it has only 43% Zeal and I want an arsekicking crusade I don't have to supply much troops for. I want to see Knights Templar and Order Footsoldiers everywhere! I also want to march it through everyone elses terrirtory to get free troops for ages.

Can I leave it parked in Spain for a while or do I have to move it every turn if I can?