OK, head on over to
http://jfm.sourceforge.net/, and download the Java File Manager, I need to know whether this will let me open and view any folder on the schools servers, it doesn't open files in windows programs, it opens them in itself, so would GP still apply? I could open the N:/ drive in it, then just go up to the parent directory in order to get to the server root, then you could access any teacher folders, student folders and even admin folders which may have account lists, or even copy templates for school letters to your usb!
It might be necessary to add: I can run .jar files at my school...
