The Mini-PCI port can be accessed easily after removing the rear cover
Unscrew the 20 Phillips screws on the underside of the T42.
Unscrew the 2 Phillips screws on both sides of the T42's rear.
Flip the laptop over and open the screen.
Carefully maneuver the palm rest away from the keyboard, as both the keyboard and palm rest/trackpad will come off together.
Remove the screw affixing the bracket down.
Lift the bracket up and out.
Carefully disconnect it from the motherboard and pull it out of the device.