unblocking ports,port forwarding breaking firewalls

I'm currently at university and am living in halls of residence.We have access to the internet but thats it!I can't download anything!I str***le to use messenger and so on.I did a port scan and the only port that looks open and fully functional is port 80.I need to open be able to use other ports to use news groups,imesh,messenger adn so on.Does anyone have any ideas what software there is that can help me out.I've looked into proxies aswell but no luck!
Thanx :)