May I ask if you managed to add custom cries for your extended PKMN in your hack? I can't seem to add new cries to new PKMN that I inserted. :/ Also, about the headers... No, I don't know how to add new ones. I hear they're quite difficult to do, maybe impossible, even for Emerald and FireRed. I could be wrong, but as far as I remember, adding new Map Headers is not possible at the moment. :/