If your network admin has blocked filesharing, there's aren't settings for that.

The proxy settings might help, but you would have to know the IP of a proxy, and I haven't heard of many people having much success that way.

http://www.gnutellaforums.com/showth...threadid=32882 might be the sticky you were looking for

Really though, your best bet is to talk with the network admin and work something out, or get a different ISP.