Eligible patients must have completed concurrent chemoradiation with a standard chemotherapy regimen (either cisplatin/etoposide or carboplatin/paclitaxel) and a dose of radiation ranging from 59.4-66.6Gy, with restaging completed 28 days to 56 days post-chemoradiation. Patients with progressive disease will not be eligible for investigational treatment. Patients with stable disease/response will be eligible to register for investigational treatment of consolidation therapy to begin a minimum of 28 days and a maximum of 56 days from completion of chemoradiotherapy.