- Go to C:\Program Files\Silent Hunter III\MODS folder, (or wherever it is installed)
- Create a folder with a name that identifies as your mod.
- Inside it recreate the folderstructure of the game with only the folders that get changed files into it. And put the changed files where they belong. This usually starts with a Data-folder as the base.
When done test it by enabling the mod and play.
p.s. the search engine of subsim cannot search the readme/help file that comes with JSGME itself.