Download the (full) "Network Install" of the Service Pack , and save it to a directory (folder) on your hard drive (in my case D:\XP-SP2). Next copy your Windows XP CD to your hard drive. Just create a folder (I used \XP-CD), and copy all the contents of your Windows XP CD in that folder. Next, open a Command Prompt (Start > Run > cmd), and go to the folder where you downloaded SP2 (cd \foldername). Type the command: servicepack filename /integrate:drive/path. In my example the command is WindowsXP-KB835935-SP2-ENU /integrate:D:\XP-CD.