Installing a Mod
From King Arthur's Gold Wiki
To install mods, simply place the mod's directory in the Mods/ folder, open the file mods.cfg in the top-level directory, and add this:
nameofmymod
This would load your mod whenever KAG loads. Note that the mod's name is case-sensitive, so make sure you get that right.
Separate each mod with a linebreak.
The order of the mods is important - mods that may have conflicting files might cause issues, and mods loaded last will take preference.