Welcome to this site.
I am sorry you lost your dad and tht your mom and you now have to deal with the lung cancer.
You might consider what stance your mom would want to take regarding treatment. Some pursue a very aggressive treatment in order to knock the cancer back as far as possible as quickly as possible. For instance, some people do chemo and radiation at the same time, which would be very aggressive. Others separate the 2 treatments to make the overall treatment more tolerable. Maybe your mom would just want to take a treatment that would be effective in controling the cancer, yet be less agrressive and easier for her to tolerate. Deciding what approrach to take would be the first step. Then, you could discuss with the oncologist what the specifics of the plan are.
I think gemzar is easier to tolerate than taxol. you might ask the oncologist about using gemzar. The usual standard is 6 rounds of carboplatin/taxol or gemzar for first line treatment. Lately, some oncologists have included tarceva with carboplatin/gemzar or taxol for women who have never smoked. Ask your oncologist about that.
You should get your mom to sign a release so that you can have access to and keep copies of her medical records and reports.
I think you should visit a major cancer center to visit with an oncologist.
I hope you mom shakes the pneumonia and can find a treatment that works well for her.
Don M