panda...think I have said this before, but also try throwing a long scarf over the top of a door, then using it like a pulley, with your good arm pulling up the bad arm. Don't push yourself through pain though. Indeed, I was doing this one day when I literally felt something 'give' and within days I had about six inches of movement back. (I drew a line in eyebrow pencil on a door frame where my hand reached when I stood side on....it went up and up until finally I can now get it over my head again.)
Sweet pea, this is very similar to the physio I was given, I lay on a bed with a metal grid type thing on the ceiling above me, they attached a long spring type thing to it and a sling on the end, my arm was put in the sling and I had to just gently swing my arm from side to side, and each week the spring was notched up alittle more, and the arc in which i swung my arm was bigger, I never really had any pain, and because it was so gradual, i did;nt even notice the improvement x