It's also possible that your school either:
A) Has proprietary software going on in the background, that only play nice with Microsoft products (like IE).
B) Has IE configured in a certain way.
Basically, if they are only enforcing IE because they already have proxy (or whatever) settings set up and they don't want to have to give out that information to every kid, then that should be pretty easy to get around. If it's the first one, then you're probably SOL.
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning. -Rick Cook