I just test this and it installs XP from any USB port because it uses firadisk.

01. Insert blank USB Flash Drive and Start RMPrepUSB version 2.1.739.
02. You may use any Volume Label but Select NTFS > make no other changes, do NOT Choose Source, just [lower left] 6 Prepare Drive > OK > OK
03. Wait for it to finish then click on Install grub4dos [center right button]
04. YES > OK > [Enter] > **STOP!!** Press on Cancel [do NOT copy grldr file when asked]
05. Exit [lower right]

Extract and copy contents of folder USBbootviaFiradisk.7z  to this USB Flash Drive's root directory.

08. Copy the actual .iso file, Windows XP iso file to USB Flash Drive's root directory and make sure file name is xp.iso and not something else.

09. Disconnect E-V-E-R-Y-T-H-I-N-G from the motherboard so that only one hard drive is connected to it and make sure it is connected to one of the main Intel SATA ports, not additional ones you may have on the side.

10. F8 or F11 or F12 hit at startup should let you boot from the newly created USB Flash Drive.

You may see two versions of the USB Flash Drive.
DO NOT SELECT the UEFI version. If the non-UEFI version is not there, you need to go to BIOS and set the non-UEFI as a boot priority device.
BOTH non-UEFI and UEFI must be selected in the BIOS list, but boot from the non-UEFI version.
All non SATA/IDE drives should be disconnected, they should not show up in the boot device list at all, or the Windows XP installation may try to write to them and fail, which will crash the installation process, so only have a single IDE/SATA Windows XP drive connected

You may see the cursor flash in the upper left corner.
*WAIT*WAIT*WAIT*

11. SELECT: Widows XP Setup Step 1 (TXT-mode)

12. Wait for ISO to load and after you see Remember to press F6... message, *GET READY* to press Enter after which you will see a blue screen and at the bottom: Press F6 if you need to install a third party SCSI or RAID driver...

15. Setup is Starting Windows > Enter > F8 (to agree) > Select partition where Windows XP should be installed. No partition should ever be formatted under Windows XP, only under Windows Vista/7/8/10 so > Leave the current file system intact (no changes)

PAY ATTENTION TO DRIVE LETTER OF PARTITION YOU ARE INSTALLING TO, that will be the Windows XP system drive letter after installation completes (use C:\)

16. Wait for the process to finish and ALLOW the timer to run out telling you the computer will be restarted, do not press Enter to Restart immediately. Start pressing F8 to be able to select to boot from the USB Flash Drive again. 

17. This time SELECT: Widows XP Setup Step 2 (GUI-mode)

https://community.hwbot.org/topic/141067...-of-mainboards/

diderius6