With session_start() u start the session.
Session will not store cookies on the client computer.
With the sessions u can send the session ID (like kirk said) to every page the client is viewing.
U don't have to change the cookies stuff in the php.ini file.
session_start() --> start a session
session_register("name") --> register a session variabele
$PHPSESSID is the variabele where the session id is stored in.
Well, good luck I guesse.
Greezzzz Anita