How do I download?

[Sargon I]

Do I just transfer all the files into my modules folder, or what?

 

[rgcotl]

M&B mods are based on quite simple scheme
so mainly if the mod havent instaler you simple need to extract files in
C:\Program Files (x86)\Mount&Blade Warband\Modules
steam version have different path
C:\Program Files (x86)\Steam\steamapps\common\mountblade warband\Modules