Does this work for non cib games
... Uh... yes?
You take a loose cart and put it into a cassette case. Then you print out cover art for the cassette case, as I did. Finally, you display all of your games in a cassette holder, as I did.
In case you are asking something else, no, manuals will not fit inside of cassette cases. Neither will the boxes.
This also works for Atari Lynx games, as shown in the top right corner. Will not work for Game Gear games, but I have my own alternative solution for that.