[Zope] Changing the name of a python class in FTP Client directory listing

I have some custom python classes in a product that I want to be available via FTP. The problem is: Classes instances have some very beautifuls names like "3253474252.12" ... How could I send the (real) name of the documents to FTP clients? I tried to override manage_FTPlist with no success... Bonus question... I would like to create custom classes instances from FTP PUT requests, probably based on file extension. Any ideas? :)) Jeff