Try finding the string in one of the prop lists in preferences.app, they all control settings so it should be there..
Can I ask why you would want to do this? Seems like a waste of time to me, why not just have it turned off..
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iPhone4 16gb black - 4.1 Limera1ned
iPhone 3G 16gb white - 3.1.2 jailbroken Blackra1ned THANKYOU ONCE AGAIN GEOHOT!