Configure PHP 4 with Apache 4

[myst20 at in.gr]

Hello

During the installation of FC3, I choose to install php and apache from rpms with all extras modules.
Now I can see that I have installed PHP 4.3.10 (cgi) and Apache 2.0 but when I try to open a .php webpage like info.php it opens a window that ask me to open this file with another application.
I open httpd.conf and check that there is a new line 

  Include conf.d/*.conf

and inside directory 
  /etc/httpd/conf.d
exist the file
 php.conf

Any idea what I'm doing wrong and can't activate php in apache?

Thanks