Since my RMA drive is supposed to arrive today, and I will install Windows 7 on it, I would be happy to just focus on Windows 7. When I say networking, I'm not just talking about settings within the OSs though. In fact, the things that seem murkiest to me are all of the router settings. If I could get a handle on this, along with OS settings, I think I could learn to adapt as necessary for the other OSs. I'm not thinking in terms of just getting the network functional, because I already have that, but to tweak it in a fashion to maximize performance and security.
When I look at the possible settings in the router setup, my mind tends to either spin or go blank. I have a vague understanding, but not enough to venture changing anything.