Leisure Suit Larry: Magna Cum Laude Cheats

Secrets for sale
Go through the large gold doors to "Nice Street" (near the Swingles Van). Go to the far right of the doors and you will see a man in a green mohawk. Talk to him and he will offer to sell you the following extra bonus options:

Bonus Art 2 (miscellaneous loading screens, etc.)
Loading Screen 2 (naughtier loading screens for Zana Luba and Harriet)
Naughty 1 (makes Switch Ione, Analisa, and Elle May wear bikinis instead of their normal attire)

Easy Confidence
In Larry's room, play "Penis Pong", which will give you 20 Confidence each time you win. It is also the easiest mini-game.

Easier games
Lose a game repeatedly until you get an option saying "Should we make it easier on you?" then select "Yes".

Easy flyer distribution
When they throw an airplane, run towards them with [Left] to grab it beforehand.

Easy money
Go to the Greek Quad and stand near the frat boy who buys pictures. With your back facing the frat boy, take out your camera and snap pictures of the cheerleaders that are practicing. After taking all the pictures, turn around and sell them to the frat boy. He will charge $6 and will give you $4 for each picture. If you stand too close to the cheerleaders they will react to the flash and you will get less money for the pictures. This can be done repeatedly without penalty.

Peephole
Go to the phone by the house that Barbara Jo is in. You will see a fence that is broken. Go in the back of the fence and go near the girls' house. You will see a hole. Press [Action] to see some girls in the shower.

Super camera lens
Interact with the stage light on the left of the Swingles set. When it falls over and breaks, pick up the camera lens icon. Instead of your camera zooming to 5X, it can now zoom to 10x. You can now take closer and better pictures.

Pop culture references
In the sorority house, the names on the doors on the second floor are all grouped by character names from famous television shows or pop culture families:

Janet and LaToya (Jackson Sisters)
Wynonna and Naomi (The Judds).
Thomas, Rick, TC, and Higgins (Magnum PI)
Kelly, Lisa, Jesse, and Screech (Saved by the Bell)
Rose, Dorothy, Sophia, and Blanche (Golden Girls)
Blair, Natalie, Tootie, and Jo (Facts of Life)
Angela, Mona, Samantha, and Jonathan (Who's the Boss?)
Sondra, Denise, Vanessa, Rudy (The Cosby Show)
Sabrina, Jill, Kelly, Stefania, and Andrea (Charlie's Angels)

Money with pictures
Larry keeps egging you on to find "boobies". Take the hint. Wherever someone is buying them, there is a subject close by. The best money is paid for close-up shots of breasts when she raises her arms above her head or when she is three quarters to full profile, in 90+% of the camera frame. For these, pay is $7 each, or $4 for those not just right. Patience for the correct shot and angle makes this a little time consuming, but you can make over $30 for each roll after the assessment fee, and you can do it as long as desired.

Goodies
The vibrantly-mohawked Nigel is located in several places throughout the game and he can sell you call kinds of unlockable items (art, strip games, etc). Post-makeover-Russell can do the same for you as well, though, later on in the game.

Porn Fairy
This takes a keen eye but in several places there will be a magazine on the ground with no special actions. Check it in order to get the porn fairy who will say something then leave with a parting gift such as a rare item or multiple secret tokens. The fairy is also found outside of Larry's window after the game is completed and will sell you tapes so you can see the two endings you missed.