It can be set up by simply following the instructions Hazza has given, I did it in the current patch whilst using a 442 formation with no dmc. Just drag each player to dmc in the player instructions screen, set to lurk outside the box then drag them back to their original position.
ps, i went on an amazing run of getting 2 corners in 10 games since i set the lurk outside box exploit up, but I did score 1 of them xD.
Ain't working for me. Any idea what i might be doing wrong?