The RD8000 does have the CROW function. I've never had a need to use quad flaps, or even know how to use them but here's the info and you can go from there.

Goto "MSC". "BASIC" mode has to be off, Spoileron "SPOIR" has to be activated, then go down six keypresses for crow left aileron "CR-LA" or seven presses for crow right aileron "CR-RA"


EDIT:Page 53 in your RD8000 manual