Once you get XP installed with AHCI mode turned off, you can bring it up to SP3 level and then turn it back on. If your install disc for XP is SP3 level already, you don't have to worry about it, but if it's not, just go into the BIOS and turn AHCI off until you get through the install and update.
I need to format my pc but doesn't support sata hard disks and need to press F6 and read the diskette.
My motherboard is this http://www.asus.com/Motherboards/P5LD2_Deluxe/#support_Download_17
I don't know which is the file for the diskette to download.
Also there is not another way to format it?