I've updated the first post with the Prague graffiti livery. It can be coupled with the "clean" Prague version for some realistic train combinations.
I also did some progress on the metro station. I finished the mesh and put it into the game for a test. It still needs colors and proper lighting/shadows, but first things first - I need help again.
If anyone has a clue about coding station XMLs, please PM me and I'd send you the DAT. What I'll need is:
1. Change the internal name - right now it replaces trstat1.dat. I hope there isn't a limit on the number of stations in the game.

It should be called "Metro Station" and have a name like TRSTATM.DAT.
2. Remove all cargo types except passengers.
3. Change the appearance so that the station with roof is displayed underground, while the station without the roof is displayed above. Exactly the opposite of the default City Station. Build it on/under ground and you'll see what I mean...
And that should be about all for now. If anyone has any idea, please let me know. I'm not so good at coding and Vehicle Creator is not much use in this case.
Thanks in advance! I'm off to finishing the graphics.
-s