CoD2 Shaders - Custom weapon "camos" DX9 For my Mod.

[BrandonDR]

Hello, i am developing a singleplayer mod for Call of Duty 2, and I have come with an idea, I made a Pack-a-Punch script that works flawlessly for CoD2, and i was wondering if I could do some cool camos for the upgraded weapons and i stumbled upon with this amazing texture techinique, look how the upgraded weapon texture looks:

https://www.youtube.com/watch?v=Tro2mdhwxyw

It is important to mention that i did not make this shader, the thing is, I would like to add some custom camos for my mod but i do not know how to work with them, i do not understand how they work since i discovered them just today, if anyone could help me or collaborate with some cool shaders that would be amazing.

You can check my mod here: https://www.moddb.com/mods/the-mexican-revolution-mod