You'll then be presented with the puzzle lock, the code for which is different in each chapter: A sound will play, and you'll get a screen of text to the effect of a Moredhel Wordlock suddenly popping into existence in front of your understandably-surprised party. Open the Overhead Map and hold down Alt, Right Shift and Tilde for a moment.
Feist's Riftwar saga enters a whole new digital medium in the form of untextured polygons and hilarious-looking digitized actors.