OhHello

Alright... I think that's so detail for an answer, but anyway thanks you for giving me a right answer for this topic.

Well to be more specific, I want to import models game file into Blender, just only that, and in reverse way to turn these model into some 3d custom skin.
I don't really sure if but I once see a mod about K2 thunder got a missile laucher that kind of cut from another td then mount to the top of K2... yea just that all I want to do.

I just get started with mod in this game, completely clueless for how to, or even non-knowledge about models file in-game. I have tried a lot of tool online and search in this place too! But none of them lead me to the right thing I needed.... 
So uh can you guys suggest me what should I first figure out and the tool need for this ( a.k.a in-game editor ) I want to make mod about models.
Thanks you guys a lot.