What OS?
If you are doing a Ghost of an XP or Win2k Sysprep image, it will not require you to mess with any BIOS settings for a recently manufactured box.
In the main, if the box is ACPI compliant with updated firmware on the BIOS, both XP and Win2k essentially need to know the BIOS ACPI capability, but the CMOS settings as default settings are fine. It will essentially ignore anything other than a deliberate setting that is non-Standard.
For any white boxes you are buying for a roll-out, ignore the BIOS (technicly, the CMOS) settings. XP and Win2k during their mini-Prep phase will handle anything other than a deliberate strange setting for current BIOS releases.