OUTLINE: Patients will be randomized into 2 groups. Group 1 patients undergo CVP chemotherapy treatment by vein (IV) on days 1-3, with cyclophosphamide (CTX), etoposide, and cisplatin. Filgrastim SC (subcutaneously) is given on day 4 every 12 hours until completion of apheresis. Group 2 patients only receive filgrastim SC given on day 1 every 12 hours until completion of apheresis. Stem cells are removed beginning on day 4 for a maximum of 6 days. Upon recovery of hematopoiesis patients then receive high IV doses of CBT chemotherapy with CTX, carmustine, and thiotepa for 3 days, followed 4 days later by autologous stem cell reinfusion. Beginning on day of reinfusion, filgrastim is given bid until WBC reaches a safe level. Patients are followed for 90 days posttransplant, and then followed indefinitely for antitumor response and time to progression.