My Network Administrator allows me to have access to MSN, AIM, ICQ, YAHOO MESSENGER, IRC, KAZAA and IMESH without using any proxies or whatever.
I use a HTTP Proxy to browse webpages, which doesn't support SSL Connect methods.

Does anyone have any ideas how i can take advantage of the open ports to gain access to WinMX and Gnutella and other applications?

P.S. I have tried to use HTTP Tunnel and Socks2HTTP but their transfer rates were so deceiving.