 ARM I: Patients receive docetaxel intravenously IV over 1 hour and oxaliplatin IV over 2 hours on day 1. Patients also receive capecitabine orally PO twice daily BID on days 1-14. Treatment repeats every 21 days for 2 courses in the absence of disease progression or unacceptable toxicity. After completion of the second course, patients receive fluorouracil IV continuously on days 1-5 and oxaliplatin IV over 2 hours on days 1, 15, and 29. Patients also undergo radiotherapy 5 days a week for 5.5 weeks in the absence of disease progression or unacceptable toxicity. Approximately 4-12 weeks after completion of radiotherapy, patients undergo surgery. 