Thanks to James from ieXbeta for the heads up
The Windows XP startup disk allows computers without a bootable CD-ROM to perform a new installation of the operating system. The Windows XP startup disk will automatically load the correct drivers to gain access to the CD-ROM drive and start a new installation of Setup. You cannot upgrade from a Windows XP startup disk.
Windows XP Home Edition startup disks will not work for Windows XP Professional installations and vice-versa, so make sure you choose the correct version below!
File Name: WinXPSP1a_EN_HOM_BF.exe / WinXPSP1a_EN_PRO_BF.exe
Download Size: 4300KB / 4302KB
Date Published: 4/29/2003
News source: Microsoft Download Center