I will give it try.. if it does.. your getting a present
If you have enough space to work with, then you could use 5 groups of friendly npcs plus 2 single targs to make 37. I've never tried it with that many npcs, but it would theoretically work, if there is enough space on the map to position the pushpins at 300 from the spawn point.
Please let me know if it works. I've heard that this trick is somewhat unreliable and function differently on different maps.