Awsome, I found a solution, I was right you CAN slipstream the RAID drivers (as well as other drivers) onto a custom xp installation cdrom using a program called nLite.
Yep, that's what I would have suggested if you hadn't hit on it yourself.
Take a gander at http://driverpacks.net/
as well. My current XP install disk has been updated to SP3 with the LAN, chipset, mass storage, and CPU drivers slipstreamed in - that'll let me install on any of my systems with functional internet right out of the box, which I can use to download any other drivers I'd need (video, sound, etc).