Dirt3FovChange allows the modification of the field of view of DiRT 3's in-game cameras. It serves as a frontend for another program called binXml whose purpose is to decrypt, edit and reencrypt the binary xml files the EGO engine uses to store the camera information. Dirt3FovChange was originally posted as an archive containing binXml here. See Field of view (FOV).
The parameters concerning the field of view as well as the point of view of each of the in-game cameras are stored in a binary file named cameras.xml. There is one such file for each car in the game. They are located with other car-related data in the subfolders of: <path-to-game>\cars\models.
These files can be batch edited using Dirt3FovChange although DLC cars may prove problematic as their data is reportedly stored in a different location.
Conveniently, a backup of the binary files will be made in text format before attempting to modify them. This allows a quick restore of the most recent state.
Notes about this fix:
Default FOV, default head position.
Custom FOV of 65, default head position.
<directx forcedx9="false" />