First thing you would want to do is to go into BIOS and set your DVD/CD player as your 1st boot device. Then follow Maxtor's instructions...
The problem that you have with that motherboard in particular is that SATA recognition is part of the RAID BIOS on the motherboard. Maxtor does not pre-format their hard drives so you run into this problem all the time with them. I forget, there may be some specific instructions from ASUS, but I am pretty sure that all you need is the Maxtor instructions:
(From the manual):
New Windows 2000 or XP System or Replacing a Failed 2000 or XP Boot Drive
Before you begin. The SATA host driver for motherboards with embedded SATA controllers, or non Maxtor branded SATA hosts, are typically contained on an installation CD that is included with the motherboard or add-in controller. The SATA host drivers must first be extracted to a floppy disk before installing the operating system. Drivers for Maxtor-branded SATA cards can be downloaded from the Worldwide Support section at www.maxtor.com
or extracted to floppy from the bootable MaxBlast CD.
Boot your system from the MaxBlast CD.
Boot your system from your Windows installation CD. If you have trouble booting to the Windows XP CD, see Maxtor Knowledge Base Article #855 at
www.maxtor.com.
When prompted by the Windows installer to install a third-party SCSI or RAID driver, press the F6 key then S when prompted, to specify additional devices.
Insert the SATA driver floppy and press Enter.
Follow the on-screen prompts to finish installing Windows, then continue to
“Set the Boot Sequence (New boot drive only)”...