Hello, please do not overwrite the "role" folder. Instead, the resources from the horse expansion pack are added to the corresponding folder of the "role" tool. For example, the last file in the head folder is "spr_2_1_1_1_30". Then the names of the additional materials you add in should start from spr_2_1_1_1_31. Similarity in other areas. First, change the name, and then put it in the corresponding folder. This is the first step. First, change the name and add more materials. Step 2:

Please take a look at this video. The mounts were all crafted using the auxiliary components in the lower right corner. It's the same principle as modifying weapon effects.