Modding. Can anyone help me out?

Hi, I have a question. I had an idea that I want to replace the PE AT Halftrack with the Hotchkiss tank. It's more usefull a light tank in the beginning anyway and without the stuka support. Just the tank. So witch program do I need to do that, and hoe. I don't know much about programing and coding, so i will be happy if anyone help me.

You coulds try this.

thx :D