FastTrack is the Kazaa-Grokster-Morpheus1.3 network. A new P2P topology design. Gnutella is an older P2P network. It works...... but I haven't had that much luck with it. It's slow and becomes overloaded quite easily. You can use any of a number of clients to connecto to gnutella. BearShare, Gnotella, LimeWire, etc.