[ironmaiden01]

I am completely new to this, the only reason I made this account was to make this thread. What I'm asking is how do I start up my own LAN server with custom maps that I've downloaded, and how do I install those maps. I've already downloaded some multiplayer maps that are already in .map form, but I have no clue what to do with them. What do I do with the .map files, and how do I start a LAN server with those maps? Thanks for all the help.