Would one need to open the associated ports on antivirus/firewall software (i.e. XP's Windows Firewall) to allow the render nodes on the network to talk to each other? I ran into a proverbial wall while setting up my nodes... however, I used the default port range set by Eovia (5025, 5035, etc) which might have been part of the problem. Someone suggested I use a port range of 26000+.