Thanks, I've already added Messerwetzer, and will try a few missions to test it as they suggest.
Now, about the "Silent Hunter II Realism Pack v1.4", that's the uboatmod21.zip file. Apparently, the author has made an extra update, uboatmod22.zip. Located here:
http://www.trekweb.com/~jasonb/artic...unter_ii.shtml
It claims to make torpedo damage more realistic, but the author does note that it allows much higher scores than realistic in the campaign. Any recommendations about that? It does seem to me that some ships require lots of hits to damage them.