[B]First Step[/B]: Put the "[COLOR="DarkOrange"]maps[/COLOR]" folder into this destination "[COLOR="DarkOrange"]C:\Users\your_username\Documents\StarCraft II Beta\[/COLOR]"
Inside the "[COLOR="DarkOrange"]maps[/COLOR]" folder there will it be another folder named "[COLOR="DarkOrange"]Cache[/COLOR]" extract the maps there (in the "Cache" folder).
[B]Second Step[/B]: If you want to make this work you'll need to put the "[COLOR="DarkOrange"]Cache[/COLOR]" folder (The one you get from the download not the maps one). You will it need to go at "[COLOR="DarkOrange"]C:\Users\your_username\AppData\Local\Blizzard Entertainment\Battle.net[/COLOR]" Some of these folders are hiden, go here for more info on how to see them, is really easy.
http://www.bleepingcomputer.com/tutorials/tutorial62.html
[B][U]How to add the replays :[/U][/B]
[B]Step one [/B]: You'll need to put the "[COLOR="DarkOrange"]Replays[/COLOR]" folder here "C:\Users\your_username\Documents\StarCraft II Beta\Replays"
[B]Step two[/B]: Try and see if they work! I think the "Cache" already has everything