First, Put on a weapon cheat[magnum, gold pp7, etc.]Next,go to missions. Put it on the 2nd Bunker. Then, put it on any difficulty,[agent, secret agent, etc.]When you start the level, get your magnet watch out.Get the cell key,but don't open the cell yet.Get your weapon out and shoot the guard until he drops his gun,[That's a sign to show he's dead]Then, before he disapears, open the cell door and the guard will say "Stop, or I'll shoot!" Even though he's dead. It doesn't help you out any, but it's pretty cool.