Developers of Sympa

[Yonni Edelist <address@concealed>]

hi all,
in case you don't remember, here's my story so far:
i'm trying to integrate sympa into a single signon system, which has a PHP
interface. since this SSO has a feature which enables the user to log in once
and stay connected, i need sympa to check whether the user is already logged 
in
(using the php interface), and if so- log the user into sympa.
meaning- i want to add to sympa the following:
if (user is already logged in)
{
  log the user into sympa
}

the commad 'user is already logged in' is no problem, since i wrote a script
which connects sympa with the php interface.
my problem is:
where within sympa to insert this code (surely somewhere inside 
wwsympa.fcgi...)
- anyone has any idea?
thanks,
Yonni