Amtrack,
I do not own a Acela but would assume they are programmed the same as AA units that are both powered. One starts in forward and the second starts in reverse. You can program each with the same ID # 21. The only difference is the AA engines are both at the head of the train and on the Acela one is at the front of the train and the second is at the rear. As you do have the Station Sound Dinner the use the Train ID with just the Engine ID# 21 and the dinner ID #. Since the dinner has no motor it can be placed anywhere between the two engines,
As I said I do not own either products so others can chime in if I am incorrect. Note you can use Train # 21 when setting up the train as well.
Good Luck
JohnB
