Prostate Carcinosarcoma

My husband was diagnosed with a carcinosarcoma of the prostate.  The cancer had advanced too far to consider surgery as an option.It had also invaded his lungs.  His treatment has been as follows- radiation of primary tumor and chemotherapy  as follows.  Two rounds of doxorubicin--one round of doxorubicin and ifosfamide--two rounds of gemcitabine.  He is due for another treatment of gemcitabine in four days.  Chest xrays show no reduction in tumors in lungs.  This cancer is very rare and there is limited information available on this cancer.  Is anyone out there have any information on treatments that may have effect on this type of cancer.  I spoke to a lady with a carcinosarcoma of the utereus and she was treated on a trial basis of taxol and carboplatin and has had good results.  She was treated at Sloan Kettering.  Any help would be greatly appreciated.

 Carol