Here's a train car I'm building to slowly gain knowledge on how to get a train car into the game, then later I'll try locomotives.
Sometime after I get this into the game I'll try my hand at a Southern Pacific bay window caboose. Freeware one.
I found a forum thread that I'm going to use to try to get this into the game, it explains how to quite well.
A new progress shot of the train car. Soon after I finish the modeling and texturing stage I'll attempt to put it in Railworks. Box car will be freeware.