About saving stuff in multiplayer

I've found a lot of threads concerning how to encode some stuff so that you can save it for use in multiplayer, but I couldn't find a way to actually save it anywhere, or load it for that matter. Unless you can save gamecache in multiplayer, which, last time I checked, you can't. So, I'd be very grateful if someone could clue me in

Save codes, ie: a string printed out containing information which the player then records and inputs in the next game, allowing the transfer of information between one game to the next.

Ah, so that's what all that meant. Ok, now I feel stupid thanks!