Patients receive cyclosporine orally (PO) or intravenously (IV) on days -3 to 100 followed by a taper until day 180 and mycophenolate mofetil PO or IV on days 0-40 with a taper until day 96 in the absence of unacceptable toxicity. Unrelated donor recipients also undergo TBI on day 0. Patients undergo bone marrow transplant on day 0.