Install an original Airport 802.11b card internally.
Use a coin to rotate the battery locking screw 90 degrees clockwise.
Lift the battery out of the computer.
Pull the keyboard release tabs toward you and lift up on the keyboard until it pops free.
If the keyboard does not come free, use a small flathead screwdriver to turn the keyboard locking screw 180 degrees in either direction and try again.
Flip the keyboard over, away from the screen, and rest it face-down on the trackpad area.
Push the wire clasp toward the Airport card and pull it up to free it from the RAM shield.
Grasp the clear plastic tab on the Airport card and pull toward the right.
Hold the Airport card in one hand and use your other hand to remove the antenna cable.