Authenticating in a Debian lenny through freeradius

Hi, What should I edit in a Debian lenny aiming to authenticate my user in another server running freeradius (via PAP method, according to Alan Dekok in http://deployingradius.com) Thanks. -- Wagner Pereira PoP-SP/RNP - Ponto de Presença da RNP em São Paulo CCE/USP - Centro de Computação Eletrônica da Universidade de São Paulo http://www.pop-sp.rnp.br (11) 3091-8902