Update for anyone wondering: I've got a lot going on right now. I'm not ignoring you guys, I just haven't been able to sit down and go at it too much lately.
@Tiffxs
If you can use the CIA, you can just pop the cart in and backup from the SD copy and move it to the cart no problem. 3DSX would just require targeting the digital copy first, then the cart.
@Feroz El Mejor
The game might need an mmap XML even if it's not a 9.6+ title. I know there are a few games that never worked quite right with *hax.