>Has anyone done any work with syncronizing data in MMF.

yes... but nowhere near as involved as your scenario. I have a commercial MMF app that I need to synch and update the database from the client's Acess2000 MDB on a quarterly basis. Since making VFP and Access play together nicely is a royal PITA, we handled this with ADO as the middleman and stored the code in a dbc stored proc for ease of access at a later date when we make the sychronization more of an automated feature of the app itself.