I think what he was saying is that he wanted games that only had a picture of the cartridge to show up on the collection with a cartridge picture when a front box picture is for any reason unavailable. some people have found a good disc or cart image, but no good box image, so the database by default shows the front box art which is no image.
It also seems he wants for it to show the cart/disc by default if he lists that he has the game but does not have the case for the game. Like if I have Left 4 Dead, but only have the disc, then show the disc for my collection and not the box. I personally wouldn't care about that in my database.