OUTLINE: 2-Drug Combination Cytoreductive Chemotherapy followed by Bone Marrow Transplant with, as indicated, CNS Prophylaxis. Busulfan, BU, NSC-750; Cyclophosphamide, CTX, NSC-26271; followed by Allogeneic Bone Marrow, AlBM; with, as indicated, Intrathecal Cytarabine, IT ARA-C, NSC-63878.