code for map location?
Do you mean code for what map you want to play?
I dont know about dedicated servers, but it works with normal ones. All you do is create a server, then in console, type /map [map name here, e.g. karith].
I think thats how you do it, but im not 100% sure, and i cant try it out right now... so try it and see if it works.
And for the password, i have the same question, but since i am not in need of it urgently, i dont tend to ask....