Crackdown disc required to play Halo 3 Beta

Xbox 360 Fanboy: "On Monday, we showed you a screenshot of the Halo 3 Beta download screen in retail copies of Crackdown. Today, we have a picture of the invite card, which confirms how the process works. In short, you need to have the Crackdown game in your Xbox 360 to play the Halo 3 Beta. It does NOT show up in your 'Demos and More' tab on the dashboard after downloading it through Crackdown. This coincides with the original press release, which stated you had to load the game to download the beta. Check out the invite card after the break"