Hi
I am sorry to hear about your husband, it will be a very hard time and he'll need lots of help with everyday things.
My dad was diagnosed with non small cell lung cancer in April 2007, he passed away in March 2008. The doctor told him he had three months to live but he lived for 11 months and was able to attend my wedding.
Dad had a mixture of chemotherapy and radiation which seemed to shrink the tumour initially but did not have much effect in the end. He had intense stomach pain like your husband but it was mostly from being constipated which was caused by the pain killers he was taking. An enema given by the nurse seemed to help.
This website uses alot of scientific wording but i found it useful: http://www.chestjournal.org/cgi/content/full/123/1_suppl/244 for looking at various treatments.
When dad was still alive I also saw an article on a lady who survived lung cancer - she took something called Iressa.
I'm not sure if this has been of help but I wish you and your husband all the best.
Jennifer