You will need to set up the identity of each machine. This is done though the Network option as when you set up the protocols.

You will need to specify a different name for each PC. Its a good idea to use the first name of the computer user.

The workgroup should be the same on each PC in the network to make things easy. All the PC's on the network will need to be rebooted and you should be up and running. To check that things are OK try accessing the other PCs on the network through Network Neighbourhood.

All the PC's should appear on the network