
This application will allow you to extract usermaps and gametypes stored in films. It saves them as blf's so you must inject the maps into a CON file (and of course resign) before you transfer the file to your device. It opens only Halo 3 film or clip files. You cannot extract a usermap or a gametype from Halo 3 campaign films as they do not contain them. So don't waste your time trying to do so.
You can extract the assets from any non-Campaign film and clip, this includes Forge and MM films. If you extract a usermap and it is completely empty, that means the film contained no usermap(ie default map).
I want to thank Lux for all of his help. He's a really awesome guy. And always Supermodder just because he's fucking great.