Unfortunately this did not work : ( I've also tried copying classpnp.sys up to system32 as somebody suggested. Still pulling my hair out. I've posted questions to nVidia and Microsoft people, but apparently WinPE is so deep in the rabbit hole, nobody wants to acknowledge its existence. I can just see the guys at nVidia right now: "And then the dude goes: I'm not using XP, I'm using PE" "AHAHAHA, the poor guy is using ME, and he can't even get the name right, what a weiner!" Apparently nobody deploys nForce4 boards in large batches with RIS (sarcasm). This must be some kind of voodoo trade secret. Somebody's boss out there is going "HOLY CRAP, that was difficult, NOONE MUST KNOW. From this day forth, WE will be the only people who can deploy nForce4 boards in bulk, MUAHAHAHA!" I guess everybody is just using imaging these days. I'm having this much trouble with 32-bit PE, I get an eerie feeling once I get this fixed, it's going to be another fight getting the 64-bit drivers to work. I swear if I ever get this working I'll post a huge tutorial here and spam it all over the System Builder forums at Microsoft. They seem to think their KBXXXXX articles and CHM files have all the answers, but nobody has updated that s*** since last century. "64-bit" means "IA64" in all Microsoft docs I've read. nVidia's philosophy towards all of this seems to be "we've already answered everybody's questions, there are no unique problems. Here is a document for a wholly unrelated issue, it should point you in the right direction." And since everybody's problems have all stemmed from integrating NVRAID drivers into an XP CD, they think that's what my problem is and I just don't know what I'm talking about. Trying to explain to them my problem is actually NVATA in PE reminds of the scene in the Simpons where Marge is in Australia, trying to order coffee at a bar. Marge: "Coffee please." Bar Tender: "One beer coming right up." M: "No no, Coffee" B: "Beer" M: "COF-FEE" B: "BEE-EER"