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to assign diferant downloads to diferant users, you will need to 3 tables:
1) users
2) files
3) userfiles
the three tables will have primary key columns.
the userfiles table will be a linking table that stores the userID and FileID values to create the user -> File relationship.
see the manage relational table tutorial for an example of how to use relational tables:
http://www.webassist.com/tutorials/Manage-relational-tables


