first i would like to say its nice that you are at least trying to do something about what you don't like instead of just sit and take it like the rest of the people on here. But the zapper is made like that for a reason.
They already got critizied hard for making the zapper in the first place, by moms and activists. So thats why its made to not look like a gun and not function like a real gun. Thus why its called zapper and not wii gun.
I understand your point and feel the same way about some of the games and not being able to change the buttons around. But i understand nintendos reasoning for this too. They are not trying to get sued by every soccer mom, and stupid anti game lawyer, or politician, for making something that is similar to a real gun. If they did make one you know the next thing thats going to happen some one is going to shoot some one and say oh the wii zapper made me do it.
Its this kind of stupidity that makes us responsible gamers suffer from censorship, and unrealistic designs.(some what, its deeper than that)