Michael - he's at work with you all day - PERFECT opportunity for marker training for "quiet." I'd work on a a drl (differential reinforcment of low rates of barking) schedule and eventually move to a dr0 schedule (differential reinforcment of zero barking). You have the perfect training ground. I'm jealous of the time you get to spend with your dog.

yes I did watch all of the dvds and I use very low level stimulation for the behavior with voice comands in the car with him but what ed said in the aggressive dog video was the aggressive behivir twords people or other dogs should revive a corection with the highest level setting and to not star low and work up to a higher leavel

Michael,
do you know what Rob is talking about when he says "differential reinforcement of low rates of barking" and "differential reinforcement of zero barking"?

no not really sure what he means

Differential reinforcement of low rates of barking means that you reward your dog for barking less than usual. If a behavior is such a problem that for example you say:Quiet! and the dog only barks LESS and does not completely stop you say Yes! and still reward the dog. You don't reward if the dog is completely crazy and there is no reaction when you say Quiet.

When the dog understands that he gets rewarded for barking less and is a little bit more controlled during the barking fit you move into rewarding for not barking at all. You stop rewarding for barking less and start rewarding for no barking.

Writing this I am drawing on my experience with kids, not dogs, so I am hoping someone experienced in dog behavior will confirm/dispute this.

You better be ready to reward him with something he really loves. You may have to feed him his meals as rewards for listening to your Quiet! command if it is so frequent.

ok that makes sense I feed him raw food and own
a restaurant so I'm sure I can come up with some high value treats to give him

As far as the trainer you might want to start another thread titled: Looking for a trainer in (wherever you live) area. Good trainers are extremely difficult to come by. Good luck looking for one. We have an appointment with one on Monday and it will be an hour drive there and another hour drive back plus I was told he is really expensive. This is the closest competent trainer we have found after six years of searching.

I am teaching my dogs the same thing at home. We like to have our front door open because we have a nice storm door that lets in a lot of light. If the dogs see or hear anyone outside they will start their barking. I noticed that when I am sitting I need to stay sitting and they will stop if I say Quiet. If I get up the barking intensifies. So now I stay sitting and deal with it that way. You might want to observe if certain things you do make the barking better or worse.

Disclaimer: I am not an expert, I am just trying to help you because I am in the same hole!

If you can you might also want to post a note that says something like: "My puppy is learning to be quiet" or something like that and people might be a little more understanding.

It might also be a good idea to set up situations where you can control the environment and you know that the dog will stop if you say quiet. For example, offer your neighbor a free dinner every now and then. In return for that have him stand far away from the car where the dog can see him but will not bark. Reward that for a week and tell the dog Good quiet, good quiet. Then have the person move closer where he is still not barking and reward. Decrease the distance gradually and give your dog enough time to get used to the smaller distance.

As far as I understand this is the theory behind teaching the dog the desired behavior. This might actually be better than the differential reinforcement.
Try not to subject the dog to situations that cannot be controlled as much as possible. I know that many times it just happens but try to think ahead and avoid as much as possible.

You might also want to have him do some basic obedience inside the car (I know he is really big!) like touching, focusing, etc. so that he gets used to looking at you in the car and not at what's going on outside.

My dogs do the same and I have been working on this for some time now. After six weeks of daily work the little one actually did not bark when two people walked three feet away from the car with the window open. I thought I was going to faint!

Michael, Did you get your dog locally? If so, might the breeder be able to recommend a qualified professional to help you with some of these situations? Is this your first corso?

I'm very glad you were open to the fact that there might be other ways to train your dog other than the e-collar alone - for the car situation.

In no way do I feel qualified to guide you with a potentially aggressive dog, but what little I know of Corsos is they are by nature suspicious of strangers and extremely territorial, so please keep this in mind with ALL your training. Best of luck Michael.