When you have an original Windows XP CD, it's often out of date. Nevertheless, Microsoft allows you to update your installation CD from a service pack downloaded from its website.
Although you can do it from the command line, you can also use a very useful free tool named nLite.

1. Extract the files from the installation CD
2. Updating the installation CD via nLite

1. Extract the files from the installation CD

In our case, we have a Windows XP SP1 CD.

If you have the CD handy, insert it into your computer's CD/DVD drive and copy the contents to a folder on your computer.
If you have the iso-format CD on your computer, you can extract the contents with any compression software (such as 7-Zip that is free) or use iso file editing software.

In our case, we will extract the contents of our "Win_XP_SP1.iso" file into this folder : C:\Users\win7\Downloads\Win_XP_SP1\

2. Updating the installation CD via nLite

To integrate a service pack (and/or updates, drivers, ...) in the Windows XP installation CD, the easiest way is to download nLite.
Install the program, launch it, select the "English" language and click Next.

Click Browse.

Select the folder where you extracted the contents of the original Windows XP CD and click OK.

Note : the [BOOT] folder doesn't exist by default on the Windows XP CD. It was created by 7-Zip and contains a copy of the boot sector of the CD. But, you will not need it with nLite.

nLite will detect :

• the product name : Windows XP Professionnal (in our case)
• the language
• the integrated service pack in this one : 1
• the version of the CD
• the folder you just selected
• the size of this folder

Click Next.

Ignore the "Presets" step by clicking Next.

Enable the "Service Pack" and "Bootable ISO" options by clicking the corresponding buttons, and then click Next.

For now, nLite tells us that we have : Windows XP Professional SP1 (5.1.2600.1106).
Click Select and select the previously downloaded service pack from the Microsoft Update Catalog :

• Windows XP Service Pack 2
• Windows XP Service Pack 3

Once selected, you will see a "Extracting Files" window appear.
In fact, nLite simply uses the "/integrate" parameter implemented by Microsoft in these service packs for Windows XP.
Which amounts to doing this (depending on the service pack to integrate) :

Batch

As you can see, this is an integrated installation and not a typical installation.

Now, nLite tells you that you have the SP3 version of Windows XP.

If you look at the contents of the selected folder in nLite, you will see that a "win51ip.SP3" file has appeared.
Which simply indicates that SP3 has been added to this CD.

In nLite, click Next at the "Service Pack" step, and then click on the "Create ISO" button at the "Bootable ISO" step.

Enter a name for the new iso file.
In our case : Win_XP_SP3.iso.

Wait while writing the iso file.

Click Next.

The "Customization complete" message appears.