Sorry to disagree VU, but alain's tutorials are woo fully outdated and don't include the current Networking Capabilities of 3DGS.
I hope my White Paper "making MMO* project in 3DGS" will help update the Networking code.

Until then, look at the manual under multiplayer modus, the send_* commmand, network events, AND teh A5/A6 Network Protocal. Stare at them long enough and you start to think you know whats going on