This is another simple application that allows the user to change the password of a unconnected remote database.

Steps:
Select the database which is password protected
Enter the existing database password
Enter the new password
Confirm new password
Click "Reset Password" button to reset the database password.

http://www.access-programmers.co.uk/forums/attachment.php?attachmentid=36234&stc=1&d=1299588402

Works for both mdb and accdb versions