Separating FB Messages from the Main app and the messenger app?

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http://forum.xda-developers.com – Is there any way to receive messages through the FB Messaging app and not the main FB app? My reason being is that the FB app doesn't have separate notification tones for a notification alert and a message alert, and with both messenger and facebook installed, a message goes through on both causing double notifications to go off :confused: (HowTos)