The dev trainer is intended to allow the player to view the game in multiple camera angles. It seems that in some cases it can be difficult to use, but there are several resources that can help you walk through its use. The download for the Halo 2 Dev Trainer is located at http://www.mpcdownloads.com/forums/downloads/Game-Trainers/Halo-DevTrainer-v2.1_BETA.zip/1558.html
