Got them working during the text mode portion of the install. They don't yet work after reboot. The driver files are added to the AMD64 directory and the following lines are added to the TXTSETUP.SIF In [sourceDisksFiles] nvatabus.sys = 1,,,,,,4_,4,1,,,1,4 idecoi.dll = 1,,,,,,4_,4,1,,,1,4 nvraid.sys = 1,,,,,,4_,4,1,,,1,4 nvraidco.dll = 1,,,,,,4_,4,1,,,1,4 nvatabus.inf = 1,,,,,,,20,0,0 nvraid.inf = 1,,,,,,,20,0,0 In [sCSI.Load] nvatabus = nvatabus.sys,4 nvraid = nvraid.sys,4 In [setupData] DriverSigningPolicy=Ignore In [HardwareIDsDatabase] PCI\VEN_10DE&DEV_00E3 = "nvatabus" PCI\VEN_10DE&DEV_00E5 = "nvatabus" PCI\VEN_10DE&DEV_0065 = "nvatabus" PCI\VEN_10DE&DEV_0085 = "nvatabus" PCI\VEN_10DE&DEV_00EE = "nvatabus" GenNVRaidDisk = "nvraid" ACPI\_NVRAIDBUS = "nvraid" That last line seems to have made the difference. I got the idea of using ACPI\_NVRAIDBUS as the device ID from looking at the registry on my 32-bit installation. This still does not work after reboot. But then again, even copying the provided files onto a floppy and using F6 doesn't work for 64-bit. Maybe I should try it with the DriverSigningPolicy line in place (that wasn't there when I tried it before).