For those living in Australia or other places that prohibit the sale of this game on Steam. I can tell you right now, that there are no possible way to install this mod onto a cracked version of the game.

But with that said, Steam keys / CD Keys are your friend. You can legally purchase the keys to Hatred from a reputable provider, and then manually add the base game via Steam and then the download will start. I don't think I even had my VPN on, so you probably don't need it.

Once you've downloaded the base game, simply subscribe to this mod, you should then see it start downloading and that's it!

Hope this helps.