Triggering a Camera and a Flash Simultaneously with the Yongnuo RF603

When Mohammad posted his review of the YN-560TX, there was a question from one of our readers about whether you can trigger a camera and a flash at the same time with the Yongnuo RF603.  The question has been asked on DPReview previously  .This capability can be useful for sports (to capture multiple angles of the same shot), or architecture / real estate, for example.  I have tried several combinations of Yongnuo triggers and flashes without success, until finally I got a combination that did work.  It was so simple that I was kicking myself for not having thought of it previously.

with one speedlight