I got your Email with the 5mb attachment.
You don't need to send
all the .trn files, just the one for the specific nation that player is playing.
If someone didn't setup a password, then someone could use his .trn file to access his nation and get free intelligence. (though I suspect the criminially minded could also do this to a passworded file).
I can see however why it would be easier to just zip it all up and send everyone the same thing. (And since I'm password protected, I'm not that worried
)