 - Evidence of metastasis on radiographic metastatic workup within a preceding period of 4 months from the time of study entry, including whole body radionuclide bone scan, computed tomography CT andor magnetic resonance MR scan of the pelvis and abdomen; otherwise will perform at the time of the baseline tests and result must be normal to continue on study; results of ProstaScint or other radionuclide scans, excluding radionuclide bone scans, will NOT be used to establish metastatic disease if all other studies are negative 