Need help with Kruptar (can't insert Battle Messages)

Battle messages should be editted with the FF3usME.exe tool. What you need to do is open up the rom, go into the "Monster Editor" part, and then look to the right of the screens and change things in the "Small Captions" and "Big Captions" part. That's where all the text for the battle messages are placed. Hope this helps you.