I got my TIU's firmware updated so thank you for all the help but I am still unclear on changing the sound file in a PS 3.0 locomotive. If the locomotive already has a sound file do I need to reflash it or just proceed like any other PS 2 locomotive. I also changed the sound file in one of my locomotives from a PRR to Santa Fe file but the locomotive still reads PRR 2-8-0. Is there a way to change this? I really appreciate all of the help here.