Don´t know how it is in TS 2009 but in TS 2010 i unticked the "full screen" box in the main options menu and have changed the display option to 1024x768 on my 1400x900 screen laptop.
So it works fine here.
I used Windowed mode a lot when making videos. You can get a good small AVI or Flash file running Trainz in 640 x 480, the cropping the screen even further with the screen capture software. It's the best way to do it for YouTube. it stops all the jerking, makes the videos fast to load and that makes a lot of people happy. I've been meaning to do a tutorial on it and maybe I will.
Don´t know how it is in TS 2009 but in TS 2010 i unticked the "full screen" box in the main options menu and have changed the display option to 1024x768 on my 1400x900 screen laptop.
So it works fine here.