Install an original Airport 802.11b card internally.
Use a coin to turn both battery locking screws 90 degrees to the left.
Remove the battery cover.
Remove the battery from the computer by pulling up on the plastic tab.
Pull the keyboard release tabs toward you and lift up on the keyboard until it pops free. Note that the keyboard ribbon is still attached to the logic board, so you cannot completely remove the keyboard yet.
If the keyboard does not come free, use a small flathead screwdriver to turn the keyboard locking screw (between F4 and F5 key) 180 degrees in either direction and try again.
Rotate the keyboard away from the screen and rest it face-down on the trackpad area.
Grasp the clear plastic tab on the airport card and pull up and toward the display.
Hold the airport card in one hand and use your other hand to remove the antenna cable.