Did a search, too lazy to go down to the basement:
As I recall...(programming on main)
For running "Elephant Style"
Select 1st locomotive address
Select CV19
Choose a consist address of 1 -127
(Optional)
Select CV50
Set CV50 to 1 (this sets up lights for the lead locomotive)
Exit programming mode
The horn should sound indicating the locomotive is programmed.
Select 2nd locomotive address
Select CV19
Set to the same consist address as the first locomotive
(Optional)
Select CV50
Set CV50 to 3 (this sets up the lights as the trailing locomotive and also shuts down the horn and bell)
Exit programming mode
The horn should sound indicating the locomotive is programmed.
Both locomotives (facing the same direction) should now operate under the chosen consist address.
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For back-to-back operation, set CV19 to 128 + chosen consist address on the second locomotive. The second locomotive will operate in reverse of the first locomotive.
Rusty