Nope, I´ve downloaded this SoundFont, created the folders inside the data folder and edited the game config to my file system, but it didn´t work, still strange sounds. I guess this will be a longer ride to get this working. But thank you!
BTW, I used the free version of mdosbox for a long while and it did everything I needed. Still bought the paid version and this is one of the few apps where I would have paid twice for what you did there. Great job!