Haven't read the whole topic, so dunno if anyone has said this, but; if they do make a 1:1 copy, the way they could go about it is having the Rom manager in ds mode, like how flashcarts work on the 3ds now. Then that Rom manager in ds mode would pick one of the 3ds roms and restart the handheld with that specific game loaded as the cart in the 3ds on the menu. Seems like it could work, but I honestly don't know that much about how flashcarts actually operate.