Using the Column Manager may be able to do the selection you want, but the following simple script will do it quickly.
Names Default To Here( 1 );
dt = Current Data Table();
For( i = 1, i <= N Cols( dt ), i++,
If( Column( i ) << get data type == "Character",
Column( i ) << set selected
)
);
You can also use JSL to do the moving
dt << move selected columns(To First);
Jim