Thank you for the info but my Prodigy Express handheld only goes up to F13. The manual includes info on the other handhelds as well.
I want to disable the start-up function on my H12-44 in which I have a Loksound 4.0 decoder installed but my Prodigy Express has no "F14" button. Is there a way around this? BTW, the sound and the decoder works great! I also replaced the motor in the Walthers model which had an issue. Great running loco now. Right now, I start the engine initially by running it at slow speed and then pushing F8, which brings the engine on instantly.