I actually just had a look and my copy doesn't have a bonus disc. Google tells me it was Jade Cocoon?
Ya the bonus disc is a Jade Cocoon Demo, its basically Hayao Miyazaki's version of Pokemon.
THE BEST METHOD to run PSX games (and everything else for that matter) is via Retroarch - http://buildbot.libretro.com/nightly/
If you have any questions on how to set it up on Windows please feel free to ask, its very easy.