You may still need the drivers to load XP. I have an Giga-byte M.B. Intel based with SATA. When I install XP Pro SP2 I will get a (no hard drive found) if I try to install windows just from the CD-rom alone. Gigabyte posts the driver on ther web site and its easy to do. Download the file, install on a floppy. When you first start the windows installation you will see at the bottom of the screen note to push F6 to load drivers. It will contuine to load for a moment then stop and ask for the driver disk to be inserted in A: pop in the floppy push enter, it will show the driver on the screen push enter again and it will load the driver and finish the install.
Standard IDE mode = no problem (never actually seen a problem ever with standard IDE) refering to SATA 0 / 1 only. Also gigabyte fixed this problem on the second revision of the board. My intel board needs no driver to be installed during installation of windows (both are 875p chipset)