REGIMEN II (subset 2 patients)[closed to accrual as of 9/23/2011]: Patients receive VAC chemotherapy and radiotherapy** as in regimen I and VA chemotherapy comprising vincristine IV over 1 minute on day 1 of weeks 13-21, 25-33, and 37-45 and dactinomycin* IV over 1 minute on day 1 of weeks 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, and 46. Patients with clinical group III disease may undergo second-look surgery at week 13 followed by response-adjusted radiotherapy, and continued VA* chemotherapy. In both regimens, treatment continues in the absence of disease progression or unacceptable toxicity.