DISEASE CHARACTERISTICS: Histologically or cytologically diagnosed lung cancer including the following: Relapsed limited stage small cell lung cancer (SCLC) Limited stage SCLC responding to conventional radiotherapy Extensive stage SCLC Stage IIIB and IV non-small cell lung cancer (NSCLC) Stages II-IIIA NSCLC who are unable or unwilling to undergo surgery but are acceptable candidates for high dose chemotherapy Cryopreserved peripheral blood stem cells with CD34 count greater than 2000/mm3 No untreated or uncontrolled brain metastases