[mod_python] Using mod_python on a commercial hosting provider

Hello,
I'm trying to use mod_python on a commercial hosting provider, that give 
me really few info about their setting. I now only that they have 
python2.2 in /usr/bin and that python is linked to apache via 
mod_python. Now, how can i execute the simple "hello word" script 
written in the manual?

from mod_python import apache

     def handler(req):

         req.content_type = "text/plain"
         req.send_http_header()
         req.write("Hello World!")

         return apache.OK

how can i set a python handler if i have not write access to httpd.conf?

Thank you in advance,

_Andrea Fiore