I know how to edit a texture file but I don't know how to edit a dff file :( because of that I just edit the txd files.

I don't know who edited this mod. I found it in a youtube video then I download it and edit the txd file :)
if this mode is yours please contact me. I will add your name to comments or here...

You can find to this mod's original files it's here :
https://www.youtube.com/watch?v=QdCesQOj934