Download the standalone service packs to your desktop, if your disc includes these Service Packs you don't need to download them:
Or if you want a more up to date disc or need to slipstream SATA drivers. If you have lost your own and want to make a new one from a copy of your friends. This guide is useful if you need to make an XP disc e.g.
Do not Slipstream any Service Pack, Internet Explorer 8 or Windows Media Player 11 if you have XP Media Centre Edition - it will break the installation. Insert your Dell Windows XP Reinstallation CD/DVD and copy the entire contents of your XP CD/DVD to a folder on your desktop.