SuperStiff mode:
Correctly answer nine out of twelve bonus questions.
To unlock SuperStiff mode easily, play through the level as usual. When the bonus question appears, guess it as normal, but write down the correct answer. Do this until you get to question 10. if you have not already unlocked SuperStiff mode, quit the level and play it again. Now that you have the answers to the bonus questions, choose the correct answer and the Flash-O-Meter should disappear after question 9.

Unlock videos, cheerleaders, and pictures:
Successfully unlock SuperStiff mode in each level.

Behind the Scenes pictures: Level 1
Nikki: Level 2
Hey, Ladies! video: Level 4
The Girls of Summer pictures: Level 5
Monique: Level 6
Mind F*** video: Level 7
Eye Candy pictures: Level 9
Simone: Level 10
Back Stage video: Level 11
Got Titty pictures: Level 13
Mandy & Mandi: Level 14
Meet Matt video: Level 15
The Fruits of Our Labor pictures: Level 17
The Babes video: Level 18
Night At Padre video: Level 19
Game Over! video: Level 20
Boobs, Babes and Boobs pictures: Level 20