There's actually a fourth movement of Artifact of Power, which is the Shadows Left by Time that I mentioned. I believe that's the final one. In any case, I unfortunately haven't had the pleasure of listening to all four movements successively since I've only been able to track down the first and the last (and I no longer have the last on my hard drive, sigh).

Indeed, though, I'd imagine that all four make for a grandiose aural experience. I love his idea of transmuting the brief ocarina melodies into full-blown orchestrated tracks.