[TheBang]

Yes, those 5 tracks are part of the DVD-ROM section on the disc. They are accessible via a Macromedia Director project that lets you do some kind of interactive stuff (I forget what exactly), as the description says on the back.

You can also access the asset files directly on the disc through the file system. IIRC, they are LPCM tracks contained in a QuickTime file. They are 16-bit, but only 22 KHz, so they don't have the greatest fidelity.