Hey,
I did the weather mod and got into some problems. At least I think it was, the problem could have been with sh3 commander. It's that crash dive where your frame rate drops very low and your submarine dives really quick. It's not a crash to desktop. Just a game crash.
here is the link to where this is discussed:
http://www.subsim.com/radioroom/showthread.php?t=118212
The correction to the problem is in there too.
edit: the correction to the problem is in the 2 subsim links that are about half-way through the original link that is right above.