How to get builds larger than one chunk in-game.

I am working on my mod and I have a dungeon that is larger than a single chunk (The maximum structure blocks allow) I have found a way for it to work in the world I built it because all the structure files are there.  But if I load another world and find the dungeon only the first part loads due to the fact the world doesn't have the structure files. Does anyone know a way around/fixing this. I can't use any external software due to the fact the world I built it in is the one MCreator allows the user to test on because that allowed me to use my mods. If you know a way I can fix this please reply.

Thanks,

Shadow