working here on the NB4 firmware as well.. tried to freeze the old settings app through TB but both of the settings icon disappeared in the app drawer.. good thing i have folders so i just placed the other one there and set the new one as the default settings app..
just download the apk and copy/paste it in the system/priv-app folder.. overwrite the existing one and set the permission to rw-r-r then reboot the phone.. you need to be rooted to be able to copy/paste the apk to the destination..
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