I’m curious. If you are a registered Trainzer, why don’t you go on the forum and ask?
Trainz does, in fact run well on Vista, at least for me. So far as I know, there won’t be a patch. Any problems are probably on your end—drivers, insufficient RAM, etc.
It would do no good for me to ask them for a patch, as you have not given any details about your problem. As far as I know, no one over there thinks I’m an idiot. I’d like to keep it that way.
I don’t visit that forum often now that I have things I can steer.