I’ve been using NForce chipsets for all of my builds since the NForce 2 chipsets came out several years ago. I always used to use a floppy at the F6 portion of the install to load the sata drivers. I have recently found out that this is not necessary. An XP cd with sp2 does not need any drivers loaded at the F6 prompt (or slipstreamed for that matter) to use the native onboard NVidia sata ports. If you intend to run a RAID setup, then you would need them. I have since loaded three different NForce 4 motherboards, including an Asus variant, this way and have had no issues.
It is total mis-information to state that you cannot boot from a sata drive, wether it be an optical sata drive (ie a Plextor or Samsung, which I use both) or a hard drive. I found out that I had been doing it wrong all of this time when I tried loading XP onto an Asus P5NSLI motherboard, using a Plextor 755SA and a WD Raptor hd. I wasn’t using any RAID mode, just a simple install to a single hard drive. I loaded sata drivers at the F6 prompt and it would get as far as the first reboot. Upon reboot, XP would not continue loading, it would go to a black screen.
After some research, I found that loading anything at the F6 prompt for a basic non-RAID install was not only not necessary, but it screwed up installing XP.
To recap, if you are not using RAID and installing XP onto an Nforce 4-based motherboard, do not load any sata/RAID drivers at the F6 prompt. All this will do is cause major issues when you try and complete your XP install.