At that point you can slowly pull the Back Cover toward the top and away from the rear to release the rear holding tabs. Only two more screws need to be removed to release the PC Board. The one at the very bottom and the one to the side of the CF slot itself. The other two screws at the bottom don't need removing because they only hold a plastic spacer that can remain attached to the PC board. The PC Board will simply lift up and pull out of the PC Plastic Sleeve at this point.
All photos are clickable to enlarged detailed photos.
Back Cover Removed and the Lithium-Polymer battery is exposed Battery connected to top of CF Board which is attached to Sleeve CF Electronics Board separated Close Up of Electronic Board. The two lower screws do not need to be removed The other side of CF Board showing the battery. Look about an inch in front of my thumb and that is where the tab is located you need to release. The back of the battery metal mounting plate and the front of the PC slot cage is shown here. Two small screws releases the external battery from the main PC Card board.