I will tell you I searched the internet for other sounds and it is awfully tough to find some decent sounds concerning subs. I did find a 2 minute run of interior noises from a ferry. I liked it alot and changed the sound file name to make it work in SH4. Dropped it in and it played nicely. Just a suggestion, search the internet for sounds and play around with them. You might suprise yourself! Memo: save the original file in case your new files screws up the game.
