Another source of free MD instructions
I found this archived site that has a few nuggets of instruction. It seems like the site is no longer in existence but has been saved by an archiving site. Here is the link http://web.archive.org/web/20121009055358/http://www.folkofthewood.com/Dulcimer_Lessons.html
They have DAA DAD lessons and some chording. Thought it may be useful to newbies like me and others.