Help with reinserting files in Elemental Gearbolt

[Zapping Led]

Hi guys, I'm trying to translate a game called Elemental Gearbolt, for the ps1. I'm using a game-specific repacker that worked for most files, however I'm having some trouble with the credits sequence, because when I put in the edited .bin and I get to the end of the game, all I get is a black screen :/

I think this time the repacker messes up the data that's supposed to make the credits sequence start. I really don't know where to start...If you have any ideas please let me know.