I live in a third world country and relish the thought of being able to download entertainment and software via peer to peer, but I am completely new to this technology. Fortunately we have DSL with about 460 kbs download and about 73 kbs upstream (on a good day). I've recently purchased licenses for Acquisition and Xtorrent (though I find little difference between the two) and have them installed on my Intel MacBook Pro.

I would like to ask four questions. Firstly how should I configure the upload:download ratio? Next, what limits (if any) should I put on the upload and download bandwidths? Third, would you advise that I change the default listening ports (BitTorrent and Gnutella? The last question has to do with security. How should I configure my Firewall (Mac OS X Leopard)?

Thank you so much for your kind help.