DISEASE CHARACTERISTICS: Histologically confirmed metastatic or unresectable solid tumor of one of the following types: Small cell lung cancer Extensive stage (disease outside the hemithorax) or relapsed Prior cytoreduction with platinum/etoposide regimen and/or taxane containing regimen Epithelial breast cancer Stage IV or relapsed disease Prior cytoreduction with adriamycin and/or taxane regimens Testicular germ cell cancer Failure to achieve complete remission with platinum based chemotherapy Relapsed disease with at least one salvage regimen Melanoma Metastatic disease that has failed at least one biologic response modifier such as interleukin-2 or interferon Relapsed disease involving a visceral organ Renal cell cancer Metastatic disease that has failed at least one biologic response modifier such as interleukin-2 or interferon Relapsed disease involving a visceral organ HLA matched or one antigen mismatched related donor available Hormone receptor status: Not specified