PATIENT CHARACTERISTICS: Age: 18 to 55 Performance status: Karnofsky 70-100% Life expectancy: At least 6 months (unless due to hematologic malignancy) Hematopoietic: Peripheral CD4 count greater than 100/mm3 Hepatic: Transaminases no greater than 4 times normal Bilirubin no greater than 2.0 mg/dL Renal: Creatinine no greater than 2.0 mg/dL Creatinine clearance at least 60 mL/min Cardiovascular: No myocardial infarction within the past 6 months Normal cardiac function (LVEF greater than 40%) Pulmonary: FVC and FEV1 greater than 70% of predicted DLCO at least 60% of predicted Other: No other malignancy except nonmelanoma skin cancer or carcinoma in situ of the cervix within the past 5 years Not pregnant (must have negative pregnancy test within 2 weeks of therapy)