So I'm going down a particular coding path that makes me a little uneasy, as I'm purposely not deleting thins.

Does anyone know if AppGameKit automatically deletes unused imagenumbers?

Only when exiting the program.

If you don't keep loading new stuff into the game during gameplay, there is no need to delete anything, as the game got enaugh memory from the device, ifnot it would not have run in the first place. if you keep leading ned files, you should either delete the old ones, or load them over existing ones, if that deletes the old... not sure