I'm going in circles

I got hold of a DX7SE but unfortunatly it didn't have a three way flap switch, however it did bind to the cheap orange receivers and, with ModelMatch, ran all tanks independently So now I'm on the right track........I just need to find out if the 3 way flap switch on the DX7(ch6) will operate both lights and ignition on my El-mod eco boards and then which switch is used for user defined sounds?????
Someone out there must have played around with a Spektrum DX7 and El-mod?
Pleeeeaaaase help me
Mic..