PATIENT CHARACTERISTICS: Age: 75 and under Performance status: Not specified Life expectancy: Not specified Hematopoietic: See Disease Characteristics WBC no greater than 30,000/mm3 (may be reduced to less than 30,000/mm3 using hydroxyurea or induction chemotherapy) Hepatic: Bilirubin no greater than 2 times upper limit of normal (ULN)* Transaminases no greater than 2 times ULN* * Unless due to extramedullary hematopoiesis in the liver Renal: Creatinine no greater than 2 times normal OR Creatinine clearance at least 50% Cardiovascular: No prior or active congestive heart failure* LVEF at least 50%* *If receiving study cytoreductive therapy Pulmonary: Total lung capacity at least 50% predicted OR Corrected DLCO at least 50% predicted Other: No active infection No poorly controlled seizure disorders Not pregnant or nursing Negative pregnancy test Fertile patients must use effective barrier contraception HIV negative