Halo 3 Beta Customs

The lobby was discovered weeks ago. Now it's seems folks have found a way to actually play customs. I'm still searching for it. Last night browsing some www.mlgpro.com threads I saw one that had the info. I figured I'd look at it later as it was late. Now mlgpro is down until at least 1pm. In the meantime you can enjoy a primer on the menus and options available there. This is a good write-up. Go check it out.