Modding

[lorentzt]

I am abouth to try to make my first mini mod.
I downloaded the CoI Data Workbook and the tables looks easily enough understood with their headers.
But.. [&:]

If i understand it correct its not enough to change the info in the CoI Data workbook as the game is loading the info from txt files? So what i need is to save the changed parts to their respective txt files (without the headers) afther i have done the changes in the workbook?

Is there a similar header for for the diferent campaings? I whant to use most of the Grand Campaing but do some minor changes.

Thanks for any help.