How can i download halo 3 custom maps?

How can i download halo 3 custom maps? The site Bungie.net is closed and here i can only download maps for halo reach… so can you explain or help me, where i can find and upload them to my fileshare/profile?

You can only download them in-game for Halo 3.

Send the person you wish to download from a private chat, then click on their profile and look in their fileshare and download whatever you want.