Didn't he have such a training program a few years back, one that trained people to give presentations on his way of eating? It wasn't any official government sanctioned certificate involved, just the blessings of the McDougalls to use the literature (and maybe they were given some videos?) to give classes in churches and other gathering places. My memory is shot so let me try the Search...
Ah, here's a thread:http://drmcdougall.com/forums/viewtopic.php?f=1&t=7027
It sends you to this Star McDougaller's page where Dr. McD talks about his impending teacher trainee program back in 2007:http://www.drmcdougall.com/misc/2007star/nov/starjoanne2.htm
but in that first link it goes on to say how people did write and ask him about it but Dr. McDougall wasn't ready to start the classes yet. I guess he still isn't because there was no more mention of it that I could see.