program for discovering socks4 or 5 proxy server?

[hungrygoose]

ok....my problem is that at work i connect through the pre-existing LAN.....i have no control over their servers b/c it is actually a completely different company that set them up and runs them, they just let us hook in....but n e ways.....i have been trying to use a p2p file sharing program but they never seem to be able to connect, due to the firewall on the server i'm assuming.....is there a way around this?....socks4 or 5 proxy the answer?.....and if so....how do i find out what it is?.....thnx