PD Warrior did training sessions for Physios in UK this year. I went to one of these as a volunteer patient (at George Eliot NHS Hospital). After their initial PDW training sessions, the Physios practised teaching the PwP's. We all worked very hard. There was emphasis on big movements, effort, increasing speed (with music), and learning to do two tasks at once. The 'take away benefit' was having our particular mobility problems identified, and being taught the appropriate excercises.
The programme is said most beneficial when started in the early stages of PD. All the exercises are on the website, but I think it helps to have someone with you to chivvy you along and check posture etc..
By coincidence my Neuro Physio was on the course, and I gather she is now trying to set up a local PD Warrior group. Certainly something I'd want to join. I think other groups are being set up in UK.