It's great that you have converted the Ursus 920 tractor mod from FS19 to FS25! Adding sounds to a mod can definitely enhance the overall gameplay experience. If you're looking to add sound to your tractor mod, there are several ways you can go about it. Here are some general steps to consider:
1. **Sound files**: You will need sound files of the engine, start-up, idle, acceleration, deceleration, and other relevant sounds for the Ursus 920 tractor.
2. **Modding tools**: You can use modding tools like Giants Editor to integrate the sound files into your mod.
3. **XML configuration**: You will need to modify the XML configuration file associated with your tractor mod to include references to the sound files for specific actions/events such as engine start, engine idle, acceleration, etc.
4. **Scripting**: Depending on the complexity of the sound system you want to implement, you may need to write scripts to control when certain sounds are played and under what conditions.
5. **Testing**: Make sure to thoroughly test the sound implementation in-game to ensure it works as intended and adds to the realism of the mod.
If you are not comfortable with modding sounds yourself, you can reach out to the FS modding community for assistance. There are many talented modders who may be able to help you add sound to your Ursus 920 tractor mod for FS25. Good luck with your modding endeavors!