To download, just click download, say save to desktop, and let it download. After that, you must go to this location: OS(C:)/Program files(x86)/Steam/Steamapps/common/Napoleon Total War/data. You will see that the title of the mod is patch6.pack. there is a patch6.pack in the data folder already. take the patch6.pack that is there, move it to a secure location, and put my patch6 in the data folder. Then, you just run Napoleon Total War, and it works!!
The reason you should move the normal patch6 to a secure location is in the event that you don't want the mod, you can remove my patch6 and put yours back in.