Windows XP live USB EditionThis is what you need:
-USB stick with 256 MB capacity. 512 MB Recommended.
-A system that supports booting from Usb stick.

Installation:
1. Rename USB stick through file HPUSBFW.exe and format with FAT file system.
2. Copy all the files from a folder on USB stick.

Start:
1. Reboot the computer.
                                                           2. In BIOS or through Quick-boot menu choose boot from the USB