Animated Coal Load And Auto Numbering

What is all involved in designing a animated coal load? I just don't see a thing on the internet and the game docs don't seem to cover it, only how to blueprint it. Also, what is a .BAN file for Railworks? RW tools can't see it so it can't be opened. Many of the in game hoppers have coal.ban file.
Auto Numbering. PapaXpress explains this in his engine design tutorials. He says to make the place holders and the numbers 64 X 64 textures. Is that the standard or can it be smaller? End numbers on a car are smaller than 64 X64.
Thanks
Auto Numbering. PapaXpress explains this in his engine design tutorials. He says to make the place holders and the numbers 64 X 64 textures. Is that the standard or can it be smaller? End numbers on a car are smaller than 64 X64.
Thanks