Yes he is correct
Get Xbox Live on your account then in Halo Reach click "Matchmaking" from the Main Menu.
Press start on the main menu
Halo: Reach comes with a built-in map editor called Forge Mode. You can access this from the main menu of Reach.
From the main menu just select "theater".
all you need is halo 3 odst and at main menu it should say halo reach beta at the bottom. Its has to be online tho.
you go to main menu and just quit
Go tot he Main Menu and click Multiplayer.
At the main menu press Y, and choose system link or online.
You get xbox live gold and then look for matchmaking in the main menu of the game.
on halo reach you go to main menu and select forge and then select your map there start building your own map and i recommend forge world
On the main menu, press the start button and go down the menu on the left of the screen. Then press file browser.
on the home page go to main menu then go down one to matchmaking.