I created a thread in the Z series that presents an automated script to remove the security password on many WinCE based units.
No need to install Condi's Hackmode or learn the complexities of TestMode. It removes the password entirely - unlocking the unit. It also saves the existing PASSWORD.DAT file (on the SD) before removing it.
Security Password Removal Script
Please post all comments in the original thread (linked above) so it is easier to monitor.