I tried to install and configure free ZA and had difficulty getting it to work correctly with ICS and subsequently uninstalled ZA. Now, while peers have access to the internet thrugh ICS they can not access shared files or printer. When a peer tries to access the "host" they receive a message "Logon Failure: the user has not been granted the requested logon type at this computer". In this case the user is a member of Administrator group on both the host and peer.