Phosphorus-32 Plus Radiation Therapy and Chemotherapy in Treating Patients With Stage II or Stage III Non-small Cell Lung Cancer

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Drugs such as phosphorus-32 may make the tumor cells more sensitive to radiation therapy. Chemotherapy combined with radiation therapy and phosphorus-32 may kill more tumor cells. PURPOSE: Phase I trial to study the effectiveness of phosphorus-32 plus radiation therapy and chemotherapy in treating patients who have stage II or stage III non-small cell lung cancer.