Hello, I just wanna guys out there. coz ive faced same problem as you got...
Heres the step on how you can install xp on pre installed win 7.
On the Setup of your bios.
Choose the ATA instead of AHCI on the SATA configuration..
then now apply the changes. then insert your cd on the cd rom. make sure you have chosen the cd as your first boot device.
the problem now is I only have IDE AHCI and RAID for my options.. iI don't have an ATA setting... the board I EMX-ANF7025-iCafe
hope you can help...
also I've already use all 3 configurations
still blue screen appears...