I have only one ethernet cable running over the roof of my appt. from my modem/dsl router. It is connected to a powermac g4 running 10.5.8. I want to use my tibook in the same room clamshell mode with a kvm switcher. I tried wireless but it's too slow. I now have internet sharing set up with the powermac via firewire. here is the problem. the tibook will not show up on my MBP as a shared device or at all for that matter. no problem showing up on the powermac.