In your Police Quest 3 directory, locate the file called VERSION. Delete it and when you start the game, you should see a screen that says 'Which day bub?' If not, when you start the game rapidly press the RIGHT mouse button and it should com up. The box next to the 'Which day bub?' lets you type a number in it. The numbers you can type in take you to different parts of the game(I am not sure what points the take you to, but here they are):
12, 129, 133, 21, 50, 56, and 57(Note that any other number crashes the game).
Submitted by Travis Clark (firstname.lastname@example.org)