To clear something up - I just built a rig with the Epox 9NPA+, a WD 200-gig SATA drive, and XP-SP2 (was actually my first build.) It all went together without the need to load RAID drivers, hit F6, etc. - the comp and XP recognized the drive immediately and set it to Boot. BTW, here is the
invaluable guide I used and an overview of how I translated it for my build...
1. Assemble case, mobo, vid card & memory and fire it up to see if it posts. When you get to the post screen hit <DEL> to get to the Bios. Select "Load Fail-Safe Defaults" then save and exit, it will go to PCHealth screen then give you "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER" because of course you have no drives hooked up yet.
2. Turn it off and add your Sata Hard Drive (save any other hard drives for later) and your opticals & floppy. Reboot and go into Bios - look under "Standard CMOS Features" and you should see your SATA drive and your opticals & floppy. While you are in there tweaking your Bios, make sure you enable nVidia Lan if you plan on using the on-board nic (s/a with a cable modem) - that was the only issue I had with the build and it took me a whole afternoon to figure it out.
3. I downloaded and used the latest nVidia nForce4 drivers (6.7 I think?) and the most recent Catalyst package for my ATI x800 card (many recommended just downloading the driver and regular control panel and NOT the Catalyst panel, and that is what I did.) I then used the Epox disk to install the Realtek and AMD drivers. No matter if you use your Epox Disk or nVidia's mobo driver package say "NO" when asked if you want to install the nVidia IDE drivers. The Epox disk had version 5.3x of the nVidia package so I guess there was a good jump there, the Realtek drivers were the same as on the Realtek site.
It has been working flawlessly for over a week now and is unbelievably faster than my old Dell 8100.