Liposomal Lurtotecan Plus Cisplatin in Treating Patients With Advanced or Metastatic Solid Tumors

DISEASE CHARACTERISTICS: Histologically or cytologically confirmed advanced and/or metastatic solid tumor refractory to standard curative therapy or for which no curative therapy exists Clinically or radiographically documented disease No tumor marker elevation as only evidence of disease No untreated brain or meningeal metastases Previously treated and stable CNS metastases allowed (i.e., no evidence of increasing disease by CT scan for at least 4 weeks) Recommended phase II dose portion of study: Previously untreated advanced and/or metastatic disease for which a cisplatin-based regimen is indicated (e.g., non-small cell lung cancer, small cell lung cancer, ovarian, or head and neck cancer) At least one measurable lesion at least 20 mm by physical exam or x-ray or at least 10 mm by spiral CT scan PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: Absolute granulocyte count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than upper limit of normal (ULN) AST/ALT no greater than 2.5 times ULN (5 times ULN if documented liver metastases) Renal: Creatinine no greater than ULN OR Creatinine clearance at least 60 mL/min Other: No greater than grade 1 neuropathy or ototoxicity No other prior or concurrent malignancy within the past 5 years except curatively treated basal or squamous cell skin cancer or cervical cancer (for recommended phase II dose) No active or uncontrolled infe…