Lol. Most script mods use an XML injector. You just don't know it. A lot of modders who know how, write their own injector into their mod. It's how most script mods work. The external one is just for those who either don't know how, or don't feel like making their own.
As for NPCC... he refuses to release his versions to the public. The last version I saw released was almost 2 years ago. He's greedy and breaking EA's rules by permanently locking his mods behind pay walls. I refuse to use anything from him. There are other options. There are BETTER options. I even got a copy of his "paid" version and tried it... it broke my game.
Trust me. The only place for his mods are in the garbage.