Unzip the FJBattles folder to C:\Users\username\Documents\My Games\CloseCombatTheBloodyFirst\Scenarios . Play from the Command screen Custom Scenarios tab without installing the FJ Campaign. 

Most enjoyable when used with the Fog of War mod.

Unzip the Fog of War mod files to \Close Combat The Bloody First\Data\UI\Textures\Battle.The FoW folder contains instructions on uninstalling the FoW mod and returning to your TBF original file install.