RSC SD40-2 HH Model Sounds

Does anyone know how to change the sounds for this model, as well as the CN SD40-2 Wide Cab? I have spent the better part of the day, trying to alias sounds to the HH, but to no avail. All of my other models have no problem aliasing to the 645E sound pack, offered here in the download section...but these to models seem impossible. I can almost live with the prime mover sounds....but the fake "keyboard" horn, and the cow bell sounds have to go!
Thanks,
Galen

Thanks,
Galen