make sure you have plenty of crossbow ammo, and try to take out as many of the guards as quickly and quietly as possible. the first guard that you come to is at the bottom of a latter, shot him in the top of the head with the cross bow. then go down and get his ammo. then go back up the latter and go to the door on the right side of the room. open and look on the oposite gang way and you will see via your crossbow scope another guy. shoot him in the head. close the door quickly before the guy above you sees you and then open when you see that he is moving to the other side of the gangway. follow right below him and go through the doors. to make a long story short. just follow the doors that you can go into and kill everybody quickly and quietly. have a good day and good hunting

just jump down ladder & he's toast, open door & stand back & wait 4 kenny to walk away,
just walk behind him, cap two retards, go into left & use radio, back out & down right
side hall & walk behind kenny above you. cap retards & it leads to crib.