I am trying to disable the bootup chime on my Macbook (the sound that occurs before the OS kicks starts). I am running only XP w/ SP3 on the MacBook, purely XP no bootcamp, just the drivers. I know under Mac OS, muting the system volume when you reboot will also mute the startup sound, but this does not work under Windows (i.e., the chime still occurs). Does anyone know a way to achieve this result under XP. Becasue this bootup chime occurs before the OS takes control, I am assuming firmware controls it so it may not be possible without flashing.