Would this be a good thing to add to someones diet for loosing weight?

yes its a very good lean meat will help build muscle and keep you full. i assume you are also working out rugularly with a cardio and weight training schedule?

Yea I weightlift mon-wed-fri. Walk dog everyday for an hour, and skate everyday, I swear a lot when im done skating too.

chicken = low calorie + lots of protein per 4 oz serving

chicken = good

YES!
eat lots of plain chicken breast!!

I cant eat bar-b-q sauce or ketchup w/ it?

adding some is fine, moderation is key. if someone looks at your plate and cant decipher what kind of meat is under all that then there's a chance that there's too much on it

i do about 3-4 chicken breast a week, put some cajun seasoning on them and grill 'em up