Cracked! To remove the copy protection:
REN CARRIER.EXE X
E 4ED:E8 1C F6 -> 90 90 90
REN X CARRIER.EXE
A side effect is that the language selection screen does not appear either.
Fortunately it defaults to English.
A message seen in the exe "Cheat mode enabled". How to get to this?
The following published cheats DON'T WORK FOR ME:
Pause the game and type 'THE BEST IS YET TO BE'. Now, press the plus key on the
numeric keypad. The mantas and walrus will be invulnerable except to crashing
(low altitude). Or try surrending and press the + and - keys to cycle
through all the objects in the game.