-( Story related, cannot be missed )-
Entering the Corley building, you'll find the safe built into the floor. Activate it and then try to remember the passcode that Mo was trying to uncover.
*** Spoiler - click to reveal ***For those not wanting to try and figure the combinations out, there are six different combinations found within the scrap pile at the lair. The only one that works will be the one that's solely composed of numbers, being 154492.
Opening the safe will give you an audio tape and a keycard. Exit the office by going through the right door and then use the keycard on the door closest to you to enter the projection room. After watching what Ripburger plans to do with Corley Motors, mess around with the levers on the projector. Grab the left handle once and grab the right handle twice to melt the film and send him into a panic.