This is an investigational study. Capecitabine and bevacizumab have been approved by the FDA for the treatment of metastatic colorectal cancer. Erlotinib hydrochloride has been approved by the FDA for treatment of pancreatic cancer, but not for colorectal cancer. The combination of capecitabine, erlotinib and bevacizumab with radiation therapy has not been approved by the FDA. At this time, this combination is being used in research only.