IJammer, I have recently downloaded two mods - 3000 bearing range plotter and magnified hud dials (speed, heading and depth dials). Installed with JSGME and everthing works fine.
I did install these mods before updating to 1.5 and the game crashed.
The update from U-Boat Missions on steam works like a charm.
So go ahead, start moding your SH4!
P.S. Sunk my first ship last night using Dick O'Kane method. Although it was a single mission that I created so that I can practice what I lean't, it should work in Career Mode also. But anyway, a ship sunk is a ship sunk in my book
