To Configure TCP/IP In Windows XP:
Start the Windows XP Professional computer and logon as the administrator.
From the Windows desktop, click Start>Control Panel>Network Connection>Local Area Connection.
Click on Local Area Connection.
The Local Area Connection Status dialog is displayed.
Click Properties.Â
The Local Area Connection Properties dialog is displayed.Â
If TCP/IP is already installed on the computer, you will see Internet Protocol (TCP/IP) in the list of components. Proceed to Step 8.
If Internet Protocol (TCP/IP) is not in the list of components, click Install.Â
The Select Network Component Type dialog is displayed.
Click Protocol and then click AddÂ
The Select Network Protocol dialog is displayedÂ
o Click Internet Protocol (TCP/IP) in the Network Protocol list.
o Click OK. Internet Protocol (TCP/IP) is added to the list of Â
  protocols in the Local Area Connection Properties dialog.
Click Internet Protocol (TCP/IP) in the list of protocols.
Click Properties.Â
The Internet Protocol (TCP/IP) dialog is displayed. Enter the details of the IP settings of the computer here.
Click Use the following IP address.
Type the IP address of the computer in IP address.
Type the sub-net mask of the network in Sub-net mask.
Click OK.