Does it bug you when trailers drag on at the multiplex? If so, King Kong: Peter Jackson's Production Diaries may not be for you. It's the ultimate bloated preview: a three-and-three-quarter-hour plug for Jackson's three-hour remake, due in theaters Dec. 14. And it's not terribly fresh pluggery, since almost all of the bitsy material here how they built New York street sets complete with steaming sewer covers, how they fabricated animal poop was dribbled out previously at the fansite kongisking.net. (These archived communiqués disappeared in October, so now you can see them only in this $40 set. Gotcha!) But all that said, Diaries makes a tasty pile of leftovers, garnished as it is with a new segment (a sneak peek at the big T. rex fight scene) and wrapped in a cool faux-treasure-chest box with some nice concept-art lithographs (plus better picture quality than the Internet). Jackson's determination to turn himself into a kind of reality TV character is in some ways a heroic gesture, more an expression of his love for moviemaking than a commercial stratagem. Dilettantes will balk, but if you're into either Jackson or Kong, this is a dandy way to stoke your appetite for the main course.