I am referring to the unread message alert that sounds about every 10 minutes or so.
do not know if your device is the same but on mine you can not have repeating alarms for sms and so as their is no dismiss signal to the alert once you have read it maybe this i different on your device.
but i would look in the registry for a similar script but try looking in these places.
both sms and email should have a String entitled Category set to notification too so also look in
as this might contain the string Script all you need to do is remove the "r"