The puter you have your Bryce scene open on will act as the server, the other puters on the newtwork just launch Lightning, on your main machine "server" you will type in all the IP adresses of the other machines in the network rendering window. My suggestion is, take the slowest machine that you have, luanch the bryce file on it and then let your faster machines do the network rendering, use the "use host to render" function as well. what this does is, the slow machine sends out the packets of info to render to the other machines, and if the fast ones are chomping away at a tile to render, the slow "server" puter will grab a tile to render instead of waiting around for the others to finish up.

Do atleast one thing a day that scares the hell outta ya!!