I really don't want to ruin it for everyone by providing a step-by-step... After all, isn't half the fun of making a piece figuring out how to do it?

I guess if ya'all really want I could, but its so easy you'll kick yourself

Edit: Here's a parts diagram of a 2AA mini-mag lite to get ya'all going

http://www.maglite.com/anatomy_spare_AA.asp