So you all want to know how this masterpiece was constructed, right? Right? Well, here's the source for your enjoyment.
The program requires PHP 4 and mysql, though it could easily be adapted to use other databases
(or even other languages if you were feeling adventurous).
Git Repo: https://github.com/iamcal/choose
It refers to an external database library. I haven't yet published that, so you're somewhat on your own there.
Some clever folks have forked the code on github
including the db connection guts and an installer script. Take a look if you want to be up and running quickly.