If I had to develop a DIY training plan for ministry leaders -- especially Unitarian and Universalist Christian ones -- I would surely include the PBS Frontline series "From Jesus to Christ" (1998) as a resource. I had just finished my seminary education the year before, and was quite impressed in watching it. So when I was temping at PBS in 2007 and saw that it was being discontinued, I got a copy.
But I'm guessing you didn't get your copy, right? Fear not, the series is now available to view online at PBS. (Hat tip: Tensegrities) I would love to know if viewers from outside the United States can watch it.