Here is the finished fan:
[attachment=o228956]

It was a simple radio shack ac fan (which the salesperson couldn't help me shit all with!). BTW, it's louder than I had anticipated but i think i can zone it out the longer i hear it, especially since the cardboard conducts the sound too. The fan is so strong I can feel it moving air around my feet and I'm about 3 feet away. I have it blowing into the box so that means it's blowing air out through the sides and the flaps. Next.. testing it with my hps