That might work for me as well.You can edit scoreboards, however from what I have seen FIFA 19 on PS3 only has 1 scoreboard type that automatically changes colour for different competitions, unlike the older FIFA's (like FIFA 14) which have 6 or 7 scoreboard types for different countries/leagues. It uses a different system I am afraid.
So even if we find a way to edit them, the edited scoreboard will appear for ALL competitions, unlike FIFA 14 where you can have multiple scoreboards.
But is there any edits i should do on a scoreboard i downloaded or just put it in the directory?