Firstly,


Fantastic Mod 

I was getting severe crashes (as in momentary flash of the blue screen, then instant re-boot) when I started the engines or changed speed while inside the sub.
Solved it initially by removing your sh3.sdl file from the mod. I've since opened the file and lowered the doppler value of the DD_Engine.DieselEx entry from 100 to 0. No more crashes, and the rest of this mod more than makes up for the lost sound effect.
It's probably a hardware glitch on my side, but the solution to simulating increased engine noise near the engine room may be problematical on a few machines.
(Asus MB with Realteck onboard sound, 4gigs mem, XP-sp3, GWX3)