[Narrew]

Wrong Puke, what I did was inside his home network (LAN), I changed nothing on the WAN side, his router will Obtain an IP address (from the cable modem) since most ISP's rarely give a permanent IP address and refresh it every few days.

Going Static is not a problem for a home network, for a company yea, it is a problem on the network management side.

My suggestion, you do not have to worry about netbios naming, firewalls or anything else. And when you say netbios, no company will use it. Netbios is an old protocol that is inefficient (the overhead that it adds to the network may not be much for a home network, but why burden your system).