Hmm, good point. Henriksen is the face of Weyland in time periods before AND after Prometheus.
He plays a prominent role in Mass Effect 3 [lesser in the previous]. Maybe dialogue could be pinched and repurposed somehow.
As far as sound effects, I've got a clean recording of the Nostromo alarm and some stuff ripped from the movie - computer terminal sounds.
Looking for a cleaner version of the trailer sound effect.
Pretty sure I've got sound effects from the AVP games on an external hard drive somewhere - but the most iconic stuff wouldn't really fit in Prometheus - Weaponry and xenomorph screams. Maybe the cool hydraulic door sounds could be inserted someplace.