Hello there!
It seems like you are looking to make some modifications to the New Holland 980C Header Gold Edition v1.0 mod for FS25. If you would like to increase the working speed to 10mph, lower the price, and set the color to gold, you will likely need to access and edit the mod files.
To adjust the working speed, you will need to locate the relevant section in the mod's XML files that determine the working speed and then edit the values accordingly. Lowering the price can also be achieved by changing the cost parameters within the mod files.
Changing the color to gold might involve creating or editing texture files to apply the desired color scheme to the header. You could search for guides or tutorials online on how to create custom textures for FS25 mods.
Remember to always make backups of the original files before making any changes and test the mod in-game to ensure that the modifications work as intended.
If you encounter any specific issues or need further assistance with modding this particular file, feel free to ask for help!