Also, don't add them until you know the boot image doesn't already have them included: The boot images for SP2 are based on Win 7 and therefore include a lot of For SCCM 2007 SP2 boot image creation, read my blogpost here:http://www.ithastobecool.com/2009/11/02/creating-a-custom-boot-image-for-sccm-sp2-winpe-3-0/ I hope this helps! Creating boot image. Thanks! weblink
Suspect this might be the symptom for any related file not found?