Relic Castle

So I've been testing Disc changing(Link) in Pokémon Essentials so 999 map gap isn't the limit anymore, but I've found a some problems to apply this into a fangame: the Metadata, encounters, Map Connections / Location.

Is there a way to adapt all of this so you can have multiple discs and in the metadata.txt, have the info for all of them? Or would you need more than one metadata.txt?