It's been a long time since i installed XP... But from what i recall there's a point during install, while the screen is still largely blue, where it says on the bottom something like "Hit * Key if you need to install sata/raid drivers". I'm using the asterisk as a wildcard there, i don't remember what the actual key was, probably one of the F#s. Anyway try hitting that key and see where it gets you. The only time i had to use it i installed the sata drives through floppy... i don't know if it works from CD there as well, but probably.