So i buyed Battlefront for the multiplayer, but in my country, specifically my state has horrendous internet conection, so i wanna play offline single player (Or maybe in a future, play lan with friends). So i heard about thi gigantic mega pack of mods for the game, thus i cannot figure it out how to install this. Does anyone know how to make it work?

This is, unfortunately, an issue with the mod itself and you'll need to contact the developer for the mod to get it working again. Most talented modders frequent the websites swbfgamers.com and gametoast.com.

However, you can still use mods like the conversion pack if you use the fixed version that I will shamelessly plug below

http://steamcommunity.com/sharedfiles/filedetails/?id=1208640466