[U2Lynne]

For your PC, open up a terminal (for mine I go to the Start menu > Run > type C:/Command.com, but then I'm running Win 98 or something like that) then once the window opens, I type ipconfig. It then tells me my IP Address: 192.168.1.xxx (this is the local IP that we talk about setting up for your computer), the Subnet Mask: 255.255.255.0, and the Default Gateway: 192.168.1.1 (yours may be different). For a Mac, the easiest way is to click on Apple icon > About This Mac > More Info > Network; IP Address is displayed on the right (it will look like 192.168.1.xxx)