You know, here at work, I had to mess with that darn thing too.
Luckily, I only had to do a still shot, but my boss wanted the same thing only with his logo going through the water creating a wake, and froth etc.
I read the docs on creating a boat sim, and I did everything right, but my logo just bobbed there.
I even keyed it to move, but it didn't move at all? Weird.
The right person with the right experience so far in terms of this would be KBROWN.
Feel free to ask him anything, he's a great guy, and an awsome artist/programmer!
Check out Kbrowns threads on this topic here:
And this book will lead you down the right path as well with a Perfect Storm tutorial from "Secrets of the Pros".
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS