It's not likely to be able to circumvent the network admin -- if it were, network security would go all to hell and people would be able to do whatever they want on any network they wanted (and not everyone simply wants to increase their bandwidth, if you know what I mean).
If a physical ethernet cable is not run from your dorm to the CompSci lab, then there's nothing you can do about it. You can't have your computer communicate over a cable that doesn't exist.
It's not that we don't want to help, or won't take the time to help -- it's that we, physically, cannot help. There isn't anything we can do. We don't know what the network topology looks like. We don't know what switches and routers are in place. We are not the administrators of the network, so even if we could help, we wouldn't know the passwords to do what we would need to do, anyway.
The most help we can give you is this:
1) Buy an extra-long ethernet cable (however much the distance between your dorm and the CompSci lab is, plus some feet for slack and corners and what-not).
2) Plug one end into your computer.
3) Sneak into the CompSci lab, and plug the other end into an open port on the correct switch/router.
4) Guess the correct static IP, subnet and mask to assign to your computer, or let your computer auto-configure via DHCP (depending on how the network is set up)
5) Optionally, guess the credentials to the AD domain so that you can add your computer to the forest if the network is administered by Microsoft Windows and has Active Directory set up.
6) Cross fingers, hit up "google.com" and see if it worked.
That's about the only thing you can do, and that's magnitudes more than we can do here, as we don't have physical access to your network. I realize that's probably not a satisfactory answer, but seriously -- there is nothing we can possibly do to help you, as much as we would love to be able to help.
