I have a bad back and the dr. thinks that could help me and my core. i have a lot of thoracic pain.
I have herniated discs in my cervical and lumbar spine and yoga really helped.
I've also seen the same DVD's here: www.onlineyogaleader.com
There is a book by Judith Lassater called "Relax and Renew" which explains it in detail.
The poses "simple supported backbend," "supported bound-angle," "mountain brook," "supported seated-angle," "supported bridge" and "legs up the wall" are poses that will help your back.
This first video is not considered restorative but can be helpful:
"Stress Relief Yoga for Beginners with Suzanne Deason"
http://www.yoga.com/store/product.asp?Product_ID=1712
Here is another:
Crunch-"Candlelight Yoga" with Sara Ivanhoe
http://www.amazon.com/Crunch-Candlelight-Yoga-Sara-Ivanhoe/dp/B00006FMB2
You can also do a web search under restorative yoga and find a few videos.
*I would also recommend getting a yoga ball and practicing supported backbends(gently) on it for thoracic pain. I use it everyday and it's helped me a lot as has an inversion table. Best of luck to you!