PRIOR CONCURRENT THERAPY: Biologic therapy: No prior murine monoclonal antibody therapy or cetuximab Chemotherapy: See Disease Characteristics More than 1 year since prior chemotherapy and recovered Cumulative total dose of prior platinum therapy no greater than 200 mg/m2 No other concurrent chemotherapy Endocrine therapy: Not specified Radiotherapy: At least 2 months since prior radiotherapy (1 month if disease progression occurred during radiotherapy) No concurrent radiotherapy Surgery: At least 2 months since prior surgery except diagnostic biopsy Other: At least 1 month since prior investigational agent