How to Setup a Static IP Address (Win XP)
Windows XP and other versions of Windows include support for static IP addresses. Windows normally acquires an IP address from your router or Internet service provider automatically using the dynamic host configuration protocol. If you don't want to use DHCP, you can set a custom IP address in your network connection's settings. Some Internet service providers require the use of a static IP address. If your Internet service provider requires you use a static IP address, you'll need the IP address, gateway and DNS server addresses from your provider.
Click "Start" and click "Control Panel."
Select "Network and Internet Connections" in the Control Panel window, then click "Network Connections" at the bottom of the window. Double-click "Network Connections" instead if you're using the classic Control Panel view.
Right-click "Local Area Connection" and click "Properties." If you want to set up a static IP address for your wireless connection, right-click "Wireless Network Connection."
Click "Internet Protocol TCP/IP" in the list of connection items and click the "Properties" button.
Click "Use the Following IP Address" in the Properties window.
Type the static IP address into the IP Address box and press "Tab."
Type a subnet mask into the Subnet Mask box. If you don't know the subnet mask you need, leave the automatically detected subnet mask value alone.
Type the address of your default gateway into the Default Gateway box. This address is usually your router, if you're on a local network.
Type the addresses of your DNS servers into the Preferred DNS Server and Alternate DNS Server boxes. If you're on a local network, this may be the same as your default gateway.
Click "OK" twice to save the settings, then restart the computer.