Hi
This is the balance ball DVD:

Balance Ball Beginners Workout-Suzanne Deason (by Gaiam)

and the pilates DVD:

Pilates for Beginners-Jillian Hessel (Gaiam)

I used to put the DVD on on my computer and stretch the mouse lead out on the floor so that I could forward through exercises until I found ones I could do. At first there were only a few, but over time I could do more and more. It is a really good way to prove to yourself you are making progress. It also helped to release the endorphins! Using a balance ball was good for me because getting down on the floor and back up again was very hard.

I also sometimes did/do Chi Kung exercises. I use a DVD called 'The healing Code' by Dermot O'Connor. There is a book that goes with it. He overcame MS. Most of the exercises are done standing and since I couldn't stand for long I would do most of them while sitting on a balance ball.

I also really like a book called 'Anatomy of an Illness'by Norman Cousins.