You could make an emunand and downgrade it one fw version and keep going down until it works, could also need new files for the sky+.well for sure it workded with the second to last firmware version. I have updated to the latest version just before to start the hacking process. I don't remember if the Skyplus worked as soon as i updated the original firmare to the last version... but i think that it worked... i don't know if the hacked firmware disabled the Sky 3DS+...