Yeah. I extracted the .arc of the sprint mod, which unpacked for me just fine. As did the PC vanilla files. But the switch files error out, so it seems they're different somehow. That being said, I don't know how popular DDDA on switch is that this will see any development.
Hey I just extracted the nca. It appears to follow the same structure as the PC system with one small change, instead of "nativePC" it's "nativeNX". So I believe the folder structure is going to be something like
/atmosphere/titles/010032C00AC58000/romfs/nativeNX
And within that you have your...