You can define your column property (once!) by hand, then look at the table script to see how to do it in JSL ('Copy Table Script' from the table's red triangle menu, then 'File > New > New Script' and paste it in to review it). Once you have the code you can then 'Edit > Run Script'. You could do this for many files at once with a loop.
NamesDefaultToHere(1);
// Make a table
dt = New Table( "Table",
Add Rows( 6 ),
New Column( "My Column",
Character,
"Nominal",
Set Values( {"B", "M", "E", "B", "M", "E"} )
)
);
Wait(2);
// Start Here . . .
dt = CurrentDataTable();
cName = "My Column"; // Edit as required
Column(dt, cName) << Set Property( "Value Ordering", {"B", "M", "E"} );