Hum LW 4.4 and up configure those Linksys computer automaticatilly, get it at www9.limewire.com:82/download/
Also, I think that you can connect to other LW on a lan by typing the lan address in the direct connect tab: ie 192.168.1.100:6346 To know your lan IP in os x go in system preferences, network, ethernet (or airport), select configure, go in TCP/IP tab and you should see the IP address.
Bonne chance!!
