i think just about everything's been covered here. another method of adjusting shoes is removing the rubber plug on the backing plate and adjusting with an actual drum brake adjuster tool. you can get your basic drum brake tools for about 15 bucks at pep boys. usually up is tighen. the adjuster will only move one way unless you release the auto adjuster which is attached to your parking brake, which is usually a quick solution to something like this. if you don't use your e brake at all, the drums will never adjust. if it's till not right, adjust it manually like i explained through the backing plate and spin the hub by the drum. give it a good shove and try to spin it. it should spinn free and smoothe, but come to a stop before a full rotation.
as for the squeaking, i could go on and on.