I believe you could use this approach for exporting as well. You would be going back the other way in terms of concatenating all your fields together and then dumping them into the flat file into the "everythingelse" field so that SSIS could pick up the flat data. You would still want to create some sort of dictionary but it might mainly be used for converting the fields to varchar/nvarchar so that they could be concatenated. You also may need to create some special functions for concatenating based on fixed length versus delimited. If you created your business tables that mapped exactly to the fields you wanted to export, getting them concatenated into the Load_* tables wouldn't be too bad. Then your SSIS package would read the criteria of which table to pick up and export that. File names could be generated using information in the database.