Some time ago I made few changes to missions I have made.
Ardennes2coop:
(This mission is hard because its made from enemy side, protecting enemy from player).
Added ammo for Sherman tanks and cannons on the hill (they are useful to take out Tigers on the opposite hill, any help here is a big step farward..)
Both Shermans can be used, also reduced sight and hearing ranges of enemy soldiers.
Blitz:
Added some guards and added movements to make it more realistic and little more random, some of guards moving around houses sometimes will go inside the house to "rest".
I guess it can be used for mines, or maybe wait them inside.
Made reinforcement to have different number of enemy and a small group of them will sweep through main territory, even searching inside the houses.
Avoiding alarm(reinforcement) is little tricky
There are also 3 Panther tanks (with slow turret speed) to destroy, 2 of them are active.
It can be good team-play mission.
I'm pretty sure they can be downloaded
Here