Lightning Returns is double scripted. Meaning you can't just use Bruteforce to mod it.
The Programs you will need
BruteForce Save Editor 4.7
Final Fantasy 13 Encryotor
When you download "files_decrypted_by_pftool" its going to be called "1392783994491.txt". CHANGE (Rename) that too "files_decrypted_by_pftool".
Here how you do it.
If you already have BruteForce, you will need to enter this is in the "game.conf" file
; "LIGHTNING RETURNS: FINAL FANTASY XIII" (thanks to cp25stack)
That's the key so BruteForce can read your game.
Also i didn't make any of these, so if you know you made these leave a comment so i can edit this thread.
(This is my first post so please go easy on me)