If you are loading Windows XP onto a computer with a serial ATA (SATA) hard drive, you will have to manually load the SATA drivers.
The first step is to put the SATA controller drivers on a floppy disk.
Copy the Intel® 82801FBM SATA AHCI Controller zip file from website
http://www.fujitsu-siemens.com/support/downloads_1.html and expand into root directory of floppy disk. (i.e. root directory of floppy disk should contain \pide and \sata folders, txtsetup.oem, etc. files.)
Then, boot system by Windows XP installation CD, when the message "Press F6 if you need to install a third party SCSI or RAID driver" shows up, press "F6". Then, press "S" to specify additional device when next screen pops up. Put the driver floppy disk you made in and press enter to continue. If the floppy disk is made successfully, the installation program will ask for selecting driver. Please then select " Serial ATA RAID Controller(Windows XP)".) After SATA driver loaded and Windows XP can recognize the SATA HDD, you can continue to install Windows XP as usual.