How to use different php.ini

Hello In order to deal with different sites configurations how can I use more than one php.ini ? Another way will be to overide the register_globals = On directive but I don't know how to do. I know that I can use a .php.ini in user directory but this solution is not appropriate to me because the server is running under the apache user and I don't want to change this setting. Any idea ? Cordialy Joël Kermabon Neptune Internet Services