If you go to MTH web and search for your model number and the sound file is on the web, just down load it to your computer if you think necessary.
Extracting a SF from the engine is a long and tedious process that really is not necessary.
If the sf not on the web, contact MTH and they will upload it.
Frankly you always want to go to MTH for SF load, because they do update the SF and you want the last software incase of a bug in the production file.
G