Hello, can somebody explain to me how to use this mod properly? i mean for now, i now how to use post office, i mean that i place one office in one city and second in the other and link them with mailcar line. They start to produce mail and line i working but i can't figure how to use this second structure and whats most important, how to make mail transported by train?? cuz when i place a post office near train cargo stations and link them with rail line, nothing happens, mail is not produced.. :( please help me :D