Hi Alex,
I read the above again and i understand that he wants to print the address on the back of the cheque-paper.
If you are correct with your interpretation you need of course an other sequence, something like that:
PRINT-CONTROL duplex ON (you know the correct controls, so this is just the point in time)
ADDRESS and LOGO (default tray duplex ON)
NEW-PAGE
PRINT-CONTROL duplex OFF (now we should be on the back of the paper)
do the overflow things
NEW-PAGE
Preprinted Check-paper (TRY01)
~Florian