The DCS team has announced that they are opening additional integration points for 3rd party modding.
- new 3D models via 3DSMAX 7 plugin
- new cockpits (standard and 6DOF)
- new flight model settings
- new screens/UIs: welcome, mission editor, campaign editor
- new terrain maps via 3DSMAX 7 plugin (requires ownership contract)
High-quality mods will be integrated back into the DCS product. Mods can be released for free or as payware (with small royalty payments made to DCS).
source: DCS forum