Don can correct me on this if I'm wrong, but the way I understand it, they use what canon information they can (onscreen stuff), then check the licensed reference products (such as the Encyclopedia and/or Fact Files), then fill in any blanks as necessary with their own material. I may have missed a step or two in the process, but that's how I understand it.
Since the decks and crew complement of a Warbird have never been official determined, the writer must come up with those figures on his own. And, since the LUG version and the NG were writeen before the figures on the "Nemesis" site were released... Well, let's just say it's nto surprising that the figures don't match.
Former Decipher RPG Net Rep
"Doug, at the keyboard, his fingers bleeding" (with thanks to Moriarti)
In D&D3E, Abyssal is not the language of evil vacuum cleaners.