I came across this site with some trains and train textures and buildings on it.  They aren't a format that I'm familiar with, but thought I'd post it anyway.  Maybe someone will know of a program that can convert the tiles.

http://www.railwaystation.com/trainsim/free.html

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi