The navigation is easy, and they have done a great job combining Flash and HTML seamlessly. There is one within the Frame, but the main page doesn't have one. I think that's a pretty cool added effect. Makes the page more attractive. Chunks are pre-mixed phrases taken out of a musical arrangement.
Chunks open a whole new world of possibilities for audio interactivity in Flash.
And in some ways, they are more powerful and easier to work with than layers. Rather than individual instrument parts, Chunks provided with DoReMedia Sound Families are the most common song sections, such as the verse, chorus, breakdown, intro, and outro. By shuffling the order and repetitions of each chunk, you can easily tailor your own musical arrangement to the timing and visuals of your Flash project. Chunks can be implemented in a few different ways. They can be implemented almost exactly the same way as layers, triggering two or more chunks on the same keyframe, and then using volume envelopes to mute and unmute each piece of audio to create musical dynamics.