nLite is a tool that lets you make customized setup CD of the Operating Systems of Windows XP, Windows 2000 and Windows 2003.
You can include in the CD the installation of the Microsoft Service Packs and the critical patches, this way when you install Windows you will also install the Service Packs and the patches included in the CD
You can even delete unnecessary software from Windows. There are many applications that are installed by default with Windows, with nLite now you can choose which applications you want to install, saving lots of space in your hard drive. You will also save time in the installation, due to the fact that not all the applications that Windows installs by default will be installed.