Re: Wow, how reliable.
Sorry to hear it.
Always, ALWAYS take your stuff to where you are going to be and do a dry run ahead of time. Multi-monitor support is not trivial to get going (as you had the misfortune of finding out). There are folks who are really knowledgeable in the configuration of Xorg in the forums, ask around in the Hardware & Laptops section and they can tell you how to hack your Xorg.conf to mirror your primary display.
Good luck, hopefully you can get a reprieve on your grade!
"...Windows? Why would I want to soil my machine with that???"