If I somehow find the time between projects, I'd like to give this a go but from what little I've seen, I'd have to exclude the enemies from the maps. The NES can be a real bitch sometimes because of the sprite limitations, and this game is no exception. Basically, the enemies always appear in the same spot *except* that all the enemies that *could* appear might not if there are already too many of them on-screen. This would make accuracy in terms of enemy placement too time-consuming to achieve.
I must say though, that the game's various routes seem to have a great variety of settings/graphics, which is always nice to see instead of constantly re-used tilesets.