I do have a conductor's whistle in my Train soundfile.
Anybody knows how to connect this to my keyboard "B" key?
Thanks    Anthony.

This is rather easy, but you'd have to do it seperatly for every piece of rolling stock.

Might be easier to just overwrite the routes' "okay to proceed" sound.

Hi Steve,
Don't get sound when I push Tab. just a print out in OR.
As I don't have that many trains I don't mind do it in rolling stock.
I tried to overwrite the horn file, but I suppose I also have to change an Eng file.
Just don't know which one and what to type in.
Thanks for your help again.
Anthony.

You only need to change the appropriate .sms files in the SOUND folder of the stock you want to change. Just analyse the .sms files of a train that has one.