PATIENT CHARACTERISTICS: Age: Open to children and adults of any age Performance Status: Karnofsky at least 50% Life Expectancy: At least 4 weeks Hematopoietic: Hemoglobin at least 6.9 gm/dL ANC at least 500/mm3 Platelet count at least 50,000/mm3 Hepatic: Bilirubin no greater than 1.5 x upper limit of normal (ULN) (1.5 to 2.5 x ULN if receiving indinavir) Renal: Creatinine no greater than 1.5 x ULN Cardiovascular: Not specified Other: Not pregnant or nursing Contraception required in fertile patients