adric | Resume/CV query

I recently completed a fairly prestigious online course, the first seminar in a series of professional education classes for a speciality field. Overlooking my need to write a new resume/CV from scratch to replace the legacy system, what are your thoughts about how to include this class? I'm particularly interested as to the weight I should give it with respect to recent employment, recent work, past education, trade skills, certifications, and volunteer work. (Those being the areas I've thought to cover in a new resume/CV). My first guess is to put it at the top of the legacy document when I make a couple other changes.

The volunteer work (and open source project) begs a whole set of questions on it's own... we'll return to those later.