Download GAME_START_SAVE.zip

Extract the file GAME_START.sfcoesav

Find your {Documents}\My Games\Spellforce - Conquest of Eo\Savegames folder.

Usually you can find that folder in C:\Users\YourUserName\Documents

Put the GAME_START.sfcoesav file in the folder with the number corresponding to your steamid. If you are the only account playing on your pc there should only be one numbered folder.

Start your game

In your savegame menu you should now have a GAME_START savegame available.

Test if loading this savegame works.