I used this program to run programs through my schools internet blocks. I'm sure that you can get someone to install it on their computer and then you should be able to run any program through it. It's called a circumventor. Just tell someone back home; it must be outside the school, to install the program and give you the address.
www.peacefire.org/circumventor/simple-c ... tions.html
I used it and it works great!
Enjoy!