So I showed my sons the sound setup and they were very excited. I need to hook up a better set of speakers to really improve the experience. So I was thinking about how the sound would be much better with more specific sounds. This might not work out but occurred to me that the sounds in train simulator games have the sounds needed. My oldest son plays Train Simulator (I believe it's made by RailWorks). It has the ability to download a locomotive "pack" which contains the sound files for horn, bell, prime mover, etc. Could these be zipped up and used in VSD? Is there any documentation on the file format (XML maybe)?