I'm having the exact problem when using Nlite to integrate the 64-bit RAID drivers into the Windows 2003 (R2/SP2) 64-bit server setup cd then booting from the CD the Hard drives are not found. The 32-bit works fine and if I add the same 64-bit drivers from a floppy during setup it installs fine also, any thoughts? The system is a Dell Power edge 2950 with a Perc5i Raid controller.