If you want Foley to calm himself faster in between shots with his sniper rifle, enable the "Cheat mode" code. Select a short and easy mission (such as Safe Passage, Special Delivery, etc.). It does not matter which team you choose (U.S. Delta Force or British SAS). Do these missions repeatedly about three times. Foley should get a level increase, be promoted a rank, get a Sniper skill star, and if your accuracy is high enough, a service medal. This trick only works if Foley gets over 65% accuracy on the missions.