Patients then receive preparative therapy for transplant consisting of cyclophosphamide IV over 2 hours on days -7 and -6 and total body irradiation twice a day on days -4 through -1. Patients receive the PBSC transplantation on day 0. Patients also receive G-CSF IV starting on day 0 and continuing until blood counts recover. Patients then receive interferon alfa SQ daily in the absence of unacceptable toxicity or disease progression.