Patients with hormone refractory prostate cancer are eligible if they have a rising PSA or three or fewer metastatic lesions. The experimental therapy uses a patient's own white blood cells and "teaches" the cells to recognize a "flag" on prostate cancer cells. This may help the immune system destroy prostate cancer cells. Side effects reported from the Phase I/II trial include skin reactions of redness, pain & swelling at the injection site, and short-lived headache, fever & fatigue. Full details are available in the informed consent.