* Radiation therapy to the pelvis and prostate will be given once a day, 5 days a week (Monday-Friday), for 8 weeks. Each treatment takes about 10-20 minutes.
* Participants will be seen once a week for the entire 8 weeks by their study doctor to monitor and record any side effects. At the end of radiation therapy, participants will have a history and physical examination. Follow-up visits with the study doctor will be done at weeks 13 and 26 and then every 6 months for 3 years, then annually to year five.
