I found a work-around. Using the pack file editor, I opened up the seasurfaces.pack file, and made the wind_level_4_sea and wind_level_4_swell parts a copy of the level_3 parts. Now the game no longer crashes! It looks like whatever was cratering me was in the wind_level_4 data. Hopefully this only affects the visuals, which I can live with :) Now, time to crush that Mysore fleet =)