How do I add Command & Conquer repaints to the game?

Today, I reviewed the unit background of the corona mod in "Command & Conquer-Red Alert 3" and found that the Piyi Breaking Battle Tank paint is quite cool. I asked AI to make a file and prepare to apply it to the 99B. But according to the method provided by it, I didn't put it into the game for a long time. What should I do? If someone likes Pi Yi as much as I do, can you tell me how to do it or help make it into a mod