Hello, I have just installed the game and I am missing descriptions to some weapons. E.g. all turrets equipped on mother ship (missing string). I have never had such a problem with a DVD version I also own. Any idea how to fix it?

Try run the game in compatibility mode (XP and below) and disable visual themes and desktop composition, because this game is quite buggy.. if i remember correctly it's due to the DRM issue when the game originally released.