[mod_python] Automaticaly requesting "index.py/index"

Hello,

I'm currently trying to develop a website in python and I have a problem
to automatically request the "index.py/index" url.

I have a script called index.py at the url http://jibaku.net/beta/ and
when I type the previous url, I only get a "404 Not Found". I must
request http://jibaku.net/beta/index.py/index to get the correct page.
So, is there a solution to tell mod_python to automatically get :
     http://jibaku.net/beta/index.py/index
when I type
     http://jibaku.net/beta/

My configuration is an .htaccess in the beta/ folder and it contain :

AddHandler python-program .py
PythonHandler mod_python.publisher

Thanks in advance for your help.

-- 
Fabien