I looked into the problem more this morning (I was a bit distracted last night) and I found which settings are and aren't working in WINNT.SIF. The [Data] section seems to work completely. Under [unattended] it seems to all work except for maybe OemPreinstall (My $OEM$ folders don't copy, but cmdlines.txt is executed). [Display] does not appear to be working. Windows starts up in 640x480 resolution, but I have it set to 800x600. [systemRestore] doesn't work. The MaximumDataStorePercentOfDisk is set to 10%, but the OS has it set at 12%. [GUIUnattended] seems to be working. [shell] attempts to work. When Windows starts up the first time it attempts to set the theme, but it still sets to the default XP Blue theme. The Resource folder contains all the themes, and they all work if I set them manually once the OS has started. [userData] doesn't work at all. I have to enter the Product Key manually, even though I use the same key as the WINNT.SIF file has in it. ComputerName and FullName also don't set properly. [identification] doesn't set properly either. If anyone knows any reason why the installation is ignoring certain parts of the WINNT.SIF file, I'd really appreciate any help you could give. All help is welcome. Thanks again ^^