you pick two buttons that you want to designate to spread the guys.

1.....2.....3....4....5

3 is your main.


on 1 and 2, bind strafe left (walk sideways) on a key, say F9.
on 4 and 5, bind strafe right on the same key... F9.
on 1, bind strafe left (same action) on another key, say F10.
on 5, bind strafe right on the same key... F10.

so if they're all together, pressing F9 will move 1 and 2 to the left while moving 4 and 5 to the right.
then press F10 to move 1 and 5 further apart.


this is in the wiki somewhere, iirc.