I'm confused, is this a request for a small mod for the Sherman 76mm (Easy 8 Commander Call in Ability) or the OP just complaining about AEF?
Not trying to be sarcastic or mean or anything, just legitimately confused.
Also mentioned the Winter Balance, I'm guessing that is a mod already yes?
So that leaves only a win condition to edit in the "mod", but then he'd only be able to play with himself vs AI.
You can mod in a unique call in ability that just calls in the unit of choice with a Win Condition, thus allowing you to still use any mod (tuning pack)
Video Link here: Setting up a Win Condition
Navigate to time index 2:10.
Unless he has no idea how to mod at all, then I can't help you there other then make the mod for you and post it in Steam or some file sharing site.