Glad you got it sorted out, though it does not make sense to me.Had no luck whit the .iso, black screen. Then tried .ciso but it was not appearing in USBLoaderGX, so I renamed it to .iso... black screen again.
Then I put the game in WBFS on my NTFS 8gb stick... AND IT WORKED FIRST TRY I've used this setup to go trough the cutscene and save afterward and then switched back to my old setup, everything is working PERFECT now
Thanks a lot for your inputs guys! I was not too far from giving up haha.. ^^