The only way to have everyone in a single file etc. would be to have a field in that table that signified which app(s) it was supposed to be pulled into such that you had something to hit with a where clause etc. is the only thing of which I can think. I would venture this is something that most folks are going to want to do an official paid engagement upon to help you with things, as this could get fairly entailed. Hopefully this gets you pointed in a direction to check out though.
Regards, Brett
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