[Orb] Auntie Aubrey Pt 2

I just picked up Auntie Aubrey's Part 2 and am really impressed with it. The song Sunset Gun by Damage Manual is especially good. Does anyone know what kind of technique they used to get the main sound in it? It's the metallic rushing sound that comes in at 00:24 or so. Also, does anyone know if Auntie Aubrey's Part 1 has been re-released in stereo?