A1: When you start this chapter, don't move pause the game and enter the unlimited health or invincibility cheat L1(2),L2(2),R1(2),R2(2). After that, you'll be able to walk through the fire without dying. Go to the back of the room and you'll see 2 doors on the right. Go through these to enter the next room. At the back of this room, are 2 more doors on the left. Go through these to enter the next room. Turn right and walk until you reach the right wall. You will see a door on the right. Walk through here to the end of the hall and turn left to enter the next room. Walk through here to the left side of the back wall and you'll enter a short hall going left. At the end of this is a room to the right. Walk to the back of this room and you'll see stairs on your left and right. Take the stairs on the left. At the end of these turn right and you'll see some more stairs. Go up these to a door on your left. This will bring you to the next level. Move quickly through the rooms or you might have to jump over some tables and shelves to get to the doors, because of the explosions.