目前 Microsoft 的確仲有得 download 你所需要的 Windows XP Home Edition Utility (Setup Disks for Floppy Boot Install) ~
http://support.microsoft.com/kb/310994
For Windows XP Service Pack 1 (SP1)
Note Windows XP CD-ROMs that include SP1 have the text "Includes Service Pack 1" on the CD-ROM.
For information about the Setup boot disk versions that are available for download, visit the following Microsoft Web sites:
Windows XP Home Edition SP1
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=E8FE6868-6E4F-471C-B455-BD5AFEE126D8
Who should download the Setup disks?
You should download the Setup disks if all the following conditions are true:
You are installing a new, full retail version of Windows XP.
Note An upgrade installation of Windows XP does not require the Setup disks.
You have a working CD drive, but you cannot start your computer from your CD-ROM.
You can start your computer from a floppy disk drive.