When you say a peer to peer network do you mean a home network sharing the internet connection? or do you mean just a network at home. I get the feeling that you do not fully understand the term as peer to peer networking is similar to the likes of kazaa where other users can access your computer. If you are sharing the internet through one computer then you need only have za on the computer that connects to the internet as the other one will share za. Therefore remove za from the second pc unless it has stand alone internet connection. If you are using a broadband router then you dont need za at all.