my first bit of advice would be to throw all of your parelli books and videos into the garbage. Sorry, but that guy has taken things a bit far. A horse is a dang horse, lol, and the whole left/right brain thing is just too much. And from what I have seen and read, the parelli program turns out a lot of spoiled horses that walk all over their owners.
I would suggest finding a qualified trainer that can give you riding lessons on both your horse and another well trained horse. So that you can see the difference and know exactly when you are doing the right thing (the well trained horse will respond accordingly), and then transfer that skill over to your horse to teach her. If you don't know exactly what is needed for a certain result then it is very hard to train your mare to do it.
As for groundwork, if your mare pushes into your space or acts up - make her move her feet! Make her realize that being a brat is going to result in her having to work, and then when she is respecting you, let her rest. Rest is a horse's reward.
Last edited by EdmontonHorseGal; 10-01-2013 at 10:52 PM.