SkyeTheTerribleBeastie
Alright, so extract the file into your mods folder (manually) , then in the main mod.txt you must alter something here:
Remove the box part where my arrow is pointing at, so that it says ammo_storage.txt instead of ammobox_storage.txt.
Only remove the "box" where the arrrow points at, on no other location you should change a thing. save the mod.txt file after you did that, open cosmoteer and you should be able to activate it in your mods folder.
I got it working this way, if you need help just ask.
@GunsForGuns I just fixed a bug in your code, you're welcome 😉 .