So me and a friend both downloaded the same custom map to play on together but it won't show up in our options for map type? I ran to Google hoping for an answer but all I got was you need to move the map to your maps folder in order for it to be usable, however, I have no where where Steam put this map. I've done a search on the map name in windows explore and it didn't find it and I can't find a mods folder anywhere. Another source I came across said it's not possible to load up custom maps in internet multiplayer, so which is true?