On the 2nd mission where you have to assasinate the man in his villa you don't have to sneak up even close to him. Using the all weapons cheat equip a powerful sniper rifle and watch the overhead map. He will be represented by a red circle. Wait until he stops on his balcony to play golf. When he stops use the first person view with the sniper and make sure your arrow is facing exactly where his is on the map. With luck you will be able to kill him with one hit, if not fire a few more shots. You can tell if you have killed him by seeing if his circle is still moving. If you miss you have a second chance. He will head to his office, this is the only other place he will stand still. Repeat the aiming procedure and you will still be able to shoot through the wall.
Added by: tomsmiley18 Sep 8th 2006, ID#23222