Evaluation of tumor response (for participants who already have the disease) will be determined by CT scan or MRI and chest x-ray (patients with chest disease). These scans will be taken after Courses 2 and 4 , then after every 3 courses until the therapy is finished, and once more at the end of therapy. Patients who show no signs of the disease will be given a total of up to 6 courses. Patients who have the disease may continue treatment until the disease gets worse. You will be taken off study if the disease gets worse or intolerable side effects occur. If you are removed from the study, you will be asked to have a follow-up CT scan or MRI and chest x-ray to evaluate the tumor.