So I have a 2x2 grid and I installed a mod the way you listed how and it works sort of. It works in 3 of the 4 grids, but if it is set in the home servers grid that server crashes. My current workaround is to just leave that servers json without the mod so it works in the other three but any idea why it crashes just the home server?
I have been able to change the JSON by cutting and pasting into a json text editor but without the map editor it is real hit and miss with what exact island gets added, has anyone else figured this one out?