http://www.gycklaren.com/start.asp?arti ... +the+World
Before you buy it, I'll go and see exactly what it covers.
EDIT: He teaches four different versions; they're all very similar but have their own twists. The first is the standard presentation that I always use, and very similar to the one shown on the In The Trenches DVD, except with a different outcome (i.e. how many cards are face-up/face-down/red/black etc.). The second version is simply an alternative handling in case you perform the trick again. The third is an impromptu version but the catch is that you're much less specific in your prediction: you can predict how many cards are face-up/down and that there are more red cards in one half than there are black cards in the other. The fourth version involves having two spectators picking cards and then you predict whether they'll be face-up or face-down at the end.
Personally, once you're comfortable with the trick, you can alter it in a bunch of different ways to suit your needs. If you're good with maths you should be able to use a borrowed deck and say how many cards are face-up/down and how many are red/black, and possibly also how many are clubs/spades.
On his DVDs, Green teaches a way to organise cards very efficiently and surreptitiously while running through the deck. I've used this dozens of times to prepare decks for tricks like this, and no-one's the wiser.