I believe the suggested Windows XP ISO was meant to have a different SHA1 hash. From what I found, the current suggestion will actually get you a ISO named xpsp3_5512.080413-2113_usa_x86fre_spcd.iso, which doesn't appear to be bootable.
$ sha1sum xpsp3_5512.080413-2113_usa_x86fre_spcd.iso
8fa76ccea145d050fc6a506ffbdedfe53282e5b4 xpsp3_5512.080413-2113_usa_x86fre_spcd.iso
$ file xpsp3_5512.080413-2113_usa_x86fre_spcd.iso
xpsp3_5512.080413-2113_usa_x86fre_spcd.iso: ISO 9660 CD-ROM filesystem data 'GRTMUPD_EN'
Another ISO available on the Internet Archive having the suggested name, has a different SHA1 hash and is bootable.
$ sha1sum en_windows_xp_professional_sp3_Nov_2013_Incl_SATA_Drivers.iso
6947e45f7eb50c873043af4713aa7cd43027efa7 en_windows_xp_professional_sp3_Nov_2013_Incl_SATA_Drivers.iso
$ file en_windows_xp_professional_sp3_Nov_2013_Incl_SATA_Drivers.iso
en_windows_xp_professional_sp3_Nov_2013_Incl_SATA_Drivers.iso: ISO 9660 CD-ROM filesystem data 'GRTMPVOL_EN' (bootable)
I believe the suggested Windows XP ISO was meant to have a different SHA1 hash. From what I found, the current suggestion will actually get you a ISO named
xpsp3_5512.080413-2113_usa_x86fre_spcd.iso
, which doesn't appear to be bootable.Another ISO available on the Internet Archive having the suggested name, has a different SHA1 hash and is bootable.