this is indeed true of the novel, two drones and the alpha alien hold down one of the five predators and wait for a facehugger to emplant its seed within. there are two predaliens in the book not juts the one that we see at the end. as far as paul anderson is concerned - there is no directors cut, those were his words.
oh and yeah, its also in thr trailer as well, blink and you'll miss it though....
www.thorndesigns.netdarkness of acheron