 Patients receive high-dose carboplatin IV over 30 minutes on day 1; vincristine IV over 5 minutes and high-dose etoposide IV over 25 minutes on day 2; cyclosporine IV over 1 hour before chemotherapy and then over 2 hours after chemotherapy on days 1 and 2, and filgrastim G-CSF subcutaneously once daily beginning on day 3 and continuing until day 16 or until blood counts recover. Treatment repeats every 21 days for a total of 3 courses for patients with Group B disease and a total of 6 courses for patients with Group C or D disease. 