Step 4: Extract a file needed to make your new CD bootable
Before we simply burn the resulting file set to a CD, we need to make sure we have a hidden file found on your XP CD-ROM that will make your new CD bootable. We can't grab this file with My Computer, but will instead use a shareware tool called ISOBuster, which you can find on the Smart Projects Web site. The latest version at the time of this writing is 1.6.
After you download and install ISOBuster, choose to use only the product's free functionality, unless you decide to purchase it, which wouldn't be a bad idea. The ISOBuster UI will resemble the following (assuming you've left your XP CD in the CD-ROM drive):
On the left-side tree view, make sure you have selected the node named Bootable CD. You should see a file called Microsoft Corporation.img (or similar; it will be named something.img) in the right side of ISOBuster. This is the file you need to extract. To do so, right-click and choose Extract Microsoft Corporation.img. When ISOBuster prompts you, choose to download it to the root of your C: drive. Now you can close ISOBuster.
in:
http://www.winsupersite.com/showcase/windowsxp_sp2_slipstream.asp