help me complete mines part 3 !!!.thanks for you help.!!!

MINES PART 3: Go through door on your right; drop into wrecked room and kill two
rats. Climb up the lone crate next to chasm, face the closest wall and jump to
grab hold of a pipe above you. Press the left arrow key to cross chasm and Alt
to drop down on other side. Turn around and pick up the battery on shelf. Turn
around and cross to opposite wall, follow the narrow ledge to your right and
drop into the shallow side of the chasm to avoid damage from the fall, then exit
this room and return to the entrance room. Wait here to battle an ape patrol,
then head straight and take your next left. Approach the rail cart in front of
you and use the battery in the square hole in its side. Turn around and use the
control panel (as you did in Mines Part 1) to maneuver the cart away from the
tunnel it is blocking, but be sure not to block off the tunnel you just entered
this room from. Now follow the newly revealed tunnel as it descends to a pool of
stagnant water. In this area you may have to fight 1-2 rats. Turn right and you
will see a crowbar, pick it up. When you do, you will see a cut scene with a bat
flying around. Now head back to the room where you entered this mission. Go down
the tunnel directly across from the elevator and you come to a room with some
barrels and two crates. Approach the crate marked "DANGER EXPLOSIVES" and use
the crowbar to open it. Pick up the grenades inside the box and exit this room.
Go back down the tunnel and turn right at the elevator, go straight until you
enter a room with a cut scene of laughing ape guards. Approach the hole in the
floor, stand on its edge and use the grenade (Alt), a cut scene shows the
laughing apes blowing up. Drop into the hole and go through the door to your
left. In this room pick up the HF transmitter on the floor in the center of the
room. Then turn left and look at the console against the wall; a medikit sits on
top of the console, take it. Now climb back onto the crate beneath the hole you
just dropped through and jump and climb up. Now head back to where you picked
the crowbar up. Slightly enter the room to your right, then take out and use the
HF Transmitter (you will know it is working when you hear white noise). Press Q
to place the transmitter on the floor. Bear left in this room until you come to
a ridged wall. Climb the wall and step off onto the platform to your left.
Follow the platform left and jump across to the next platform. Look up and you
will see another pipe. Jump up and catch the pipe and press the left arrow key
to cross this room. When you reach the other side of the room press Alt to drop
down; then enter the door behind you. Follow a short tunnel to an elevator room
with a sleeping guard. Crouch walk to the elevator controls, stand, activate the
controls, crouch walk into the elevator, stand and activate the inside controls.