allord from your time line i niticed that you had yourd FP done in atlanta--Is it possible to have your finger done anywhere in usa,though you may have applied at memphis office
Good question, and here what I think (I may be wrong): I don't think you can do it any where in US, you have to do it in the same office where the appointment notice saying, my reason saying this because when you go the officer they will check to see if your name listed or not, and it may be before the appointment date but not before very long time may be 1 week or so.
Again this just my thoughts, some one else may have a different answer for you.