Wow Dab. Thats is how I'd pass time before I found Freelancer. Good points. Perhaps the route we take between JG and or JH is subspace. Something between string theory's newish concept of "branes"( like membrane) The layers, that devide demensions and thus give way to "places?" where the local laws of physics do not apply and thus we are able to travel at insaneo speeds.
Look up Carl Sagen and string theory. See what you can find on Branes it will be a good read but not a simple one. I think you can handle it.