CVARS files released by BattleGoat Studios for modding scenarios:
For instructions on CSV files, see the Map Editor Workshop by Balthagor.
If you do not have a program which opens XLS/CSV files, you can download OpenOffice 2 for free. The only issue with it, is that it will save CSV files with a " delimiter by default, and you must change it to ' when saving as CSV.
Note that the CSV file cannot be in use by another program (OpenOffice, etc.) or import will fail for no visible reason.