Hi Robert,
You asked an excellent question and have gotten VERY good advice, all of it. The only thing I would add is to see a good physical therapist ASAP - specifically, one who is familiar with this kind of work.
http://www.posturalrestoration.com/index.html
I think that if I had known about this 7 years ago and acted upon it, I would not have PD today. As it is, I only learned of it 3 weeks ago and just began therapy a week ago. I am headed for intense therapy this winter and hope to report good results in due time.
It may not be easy for you to see the connection this early into PD - but I can assure you that in my case it is quite remarkable. What have you got to lose by trying - except maybe PD....
With hope for us all - Ibby