Do you mean the wiimotelib or my test application
wiituio? (

Because the 4 point should work without any problems. However you'll need to use the wiiwhiteboard software or other program which uses the calibration function to switch the points around.
Unless you place the camera behind the IR source instead of in front the axis will be inverted. Thats the great thing about Johnny lee's software, he has a neet little calibration function which doesn't care at what angle/upside down or whatever the points are