update any items from https://docs.google.com/spreadsheets/d/1J8WdrubKgo8A9hPY-hbQLq4eVrb3n3lZAgiI2J7ncAU/edit#gid=984581625 t the .txt files in item_list_generators/
run generate_items.sh, which generates items.lua
copy the items.lua script into each of the main lua files
copy the newly generates lua scripts to your AMUMSS scripts/ folder run AMUMSS to generate the mod