Ah well, I have found this thread on another forum that posted pictures on what values to edit in an hex editor to get the Examination Room, but alas the files seem no longer available. If anyone has ideas, I'm curious.
EDIT: I presume it wouldn't be that complicated to create an unofficial patch that would make the Examination Room available in the original Terror From The Deep. But I could be wrong.
I've collected many live Tentaculats. It's rather easy in the Colony mission, you just have to send someone sneaking all around when you see one from afar, but they have to be in those little rooms with triangular enclosements. If there are in a place where they can go to the floor above, it's very hard, you stand back and wait that they show up again (or use a Thermal Bomb, and risk sending yourself to sleep). I've seen many Triscenes, mostly in the Terror Port missions and on the Cargo Ships, but I've only seen 2 Xarquids, both on the Cargo Ships. I need a live copy of both.
I have a hard time meeting a Heavy Cruiser (the sub). I wonder if it's because they only appear as Cruiser on the map and I don't pay attention (or I sent a sub to down them but don't bother visit because I've done too much of the smaller Cruiser and at this point, I'm doing T'leth at any moment, just looking out for the final Research items (a couple live aliens and Examination Room, if possible) and I'm done. Looking at the Heavy Cruiser picture I get a faint memory, like maybe I've done one, but I'm not even sure. I'm surprised that a type of sub would be so rare. Hunters don't appear often either but I've done at least 3 or 4. All the other subs abound aplenty.