Possible with the help of CFW. You can export save from Sky using NTR or Ninjhax, the data will be already decrypted and can be used with SDF. In emunand you just need to create a new save file in game then quit the game, export the save with SDF, overwrite the files in SDF's export folder with those you got using NTR / Ninjhax. Then return to SDF and import the save again.