[zokemon]

Yeah, sounds like the best idea. Just checksum() or md5() the file on both the client and the server and compare. This will reduce the packet size sent in your triggeraction.

Also:
After reading your initial post again, I don't think you can do what you are trying to do just yet. You will be able to get the data on the serverside (add rights to the npcserver; that is probably your problem) but you won't be able to on the client. You gotta wait like everyone else for the new client version. :[