today I installed alpha 41 and wanted to play a bit TTD. Well, I think I didn't actually play but trapped into several bugs/problems...

All mentioned files are in the attached zip-file.
First, I downloaded the new-houses and new-station-graphics. Ok, I quickly noticed that I couldn't use it (at least I did not know how to do so) in an existing game. [Can I in some way?] So I saved the game as a scenario and used "Play scenario" in the main window. The new graphics didn't cause problems, but all trains had an awfully low speed. If I click on the symbol opening the info-window of a train, e.g. train 39, ttd crashes immediately. trp07.sv0 is the scenario-file.
So I choose to not use "Play scenario" and loaded an ordinary game, trp23.sv1. Here, I get a problem with PBS: Why does train 41 wait for the green two-way-signal (42 did the same, until I told it to ignore it...). What is wrong with that station???? Or is it some bug???
(I removed that bridge (you will know which I mean) because I feared it might confuse PBS, it helped nothing)
Thanks for any help,
Wolfgang