Hmm damn. Tried the Sierra main site? Its their game after all.
Other than that try the planet half life page. They always have a shit load of links for all things half life.
What does this pack to Neon? Also, do you play Ricochet at all?
Actually, does ANYBODY play Ricochet other than me? Would be fun to get the broadbanders from the board fighting it out in that game. I of course, would rule!