Hello,
I'm a beginner here, I signed on precisely to ask this question and learn more about modding. I'm a long time TW player but have no experience with modding the games.

I downloaded the file for the diplomacy mod (found here) as well as the two here and here. Following the tutorial found here for .pack files, I placed the downloaded files in the 'data' folder. However upon starting a new campaign and getting into a war it appeared that the diplomatic penalty was unchanged from the original game, so I assume there's more to the mod installation process. Can anyone explain?

As I said I'm really new to this and not particularly tech savvy, so I know this is pretty basic but I would appreciate it if someone could answer my question and give me an introduction to how this all works. Thanks in advance.