How do you add a moving sound to rollingstock? I use davidos PacNat coal hopper and A VR BW coach and they have sounds on them but with Davidos Freightrail coal hopper the sound isn't there. I tried just copying and pasting what was in the PacNat one into the Freightrail one but it didn't work. How do I properly do this.
-Eno
-Eno