Reskinning causes server to freeze/crash.

Alright, obviously my methods were not working (if you saw what this post originally was) so now im asking for advice.

How would i go about taking a model in a gamemode - and replacing the skins it uses. Say it uses copper/iron/steel textures for the skin (has skin 0 1 2 listed ingame) and you wanted to change what textures the Skin 0, Skin 1, and Skin 2 use. All of my methods ended in corrupt models (I copied the model and changed filepaths in the hex code)(Didn’t work) and tried a reskinning hex editor that does it for you - still caused my server to crash or freeze when i hit Sending Client Info.