Check with your hospitals respiratory therapy department for suggestions. Also what is called an incentive spirometer might help. These are used after surgery to help you use your lungs and you blow into the tube to try to get the ball from one side of the chamber to the other. Again this might be available from the resp. therapy department.
I just quit smoking on 9/6/02 after smoking 2+ packs a day for 30 years. I was also just diagnosed with emphysema. http://www.healthboards.com/ubb/t_down.gif The doctor recommended walking more than anything else to help increase my breathing capacity, so maybe it would help you too. Good luck!