Not sure if this will help or bot.
But, Prophecy told me as well about the slipstream thing with nLite and I was going to use it but, I was talking to some friends and one of them said that even though my XP disk didnt have sp2 or sp1 on it to just try and install windows anyways just incase I didnt need the sata drivers because that had happened to him.
So I built my comp today finally and I booted it up and installed windows xp on my sata Seagate drive with no sata drivers installed what soever and had no problems and it ran fine for hours.
I know for sure I didnt have sp1 or sp2 because It said that I couldnt install the sound drivers till I installed Sp1 so I had no sound at the time.
Hope it helps.
Maybe it was just a random occurence when it worked with no drivers? I have no idea.