Railroad Tracks

I'm not very good with the warcraft 3 editor so I could never figure out how to get to the railroad tracks. I've seen them used in a couple of maps for the mine carts and I was wondering if theres is any way to use them in the editor? Also is there any way to lay them on bridges and ramps, as I suspect the regular doodad for the tracks wil not go on ramps or bridges. And finally does anybody here know how I could go about creating a elevated railroad bridge over water that goes on for like 6 regular bridge lengths, like around 3000 units.

There are railroad doodads? I know they have a downloadable railroad model on wc3sear.ch so I bet you could do that.

I think I saw them used for tracks under the mine carts in some campaign. Anyways thanks, I'll check out the models on wc3search. Any word on how to use them on bridges? or ramps