ohh, that´s too bad, I remember using a 4 keys combination, google suggested it could be that one (Ctrl+Alt+Shift+s), but honestly I´m not sure what was the exact combination….
Well thanks for trying!!
I tried in steam version using dosbox, and for once all I got was my missiles locking on target the moment I target them, but not needing to center the boxes, the locking was always on, but I cant reproduce the effect any more!!