Seeking advice: shipsets in PBW

[Dogboy]

I just set up a PBW game and all but one player have submitted their first turns. The one remaining player gets the message "the data files currently being used do not match the data files that were used when the game was started..."

I suspect the problem is that this player seems to have selected non-default Shipset ("Gallente"), Race Pic ("Jrii") and Flag Pic ("IA").

I think he just selected them when he signed up for the game/ uploaded his empire file. I don't think he has the modified race pic/ship set/flag pic on his system, and this is probably the cause of the file error.

I would prefer to avoid re-starting the game. Is there a simple solution? Can he just download the relevant files, and if so, where does he find them, and put them? Also, I suppose we all need to do the same, or we won't see his ships, race, flag, right?

Or, if that won't work, is there a way I can, as PBW host, just set him to use the defaults?

Related question: do ship sets (when installed correctly) lead to crashes? I'd hate to be 50 turns into the game only to discover that the "gallente" dreadnought ship crashes the game for everyone....!

Another related worry: Gallente.zip (which I'm downloading now) is huge: over 25 MB. Will this lead to substantially longer download times each turn, or does it just get installed and called up locally, with a pointer to different ship types being passed with each turn file?

Thanks a bunch!