Immobile AI Help

Hi, I am wanting to play some custom campaigns but experience issues.

THe AI behaviour is wrong and as such is unplayable. the only fix i know is to apply immobile units gold AI to the other players.

how do I get this on AOE2 DE?? theres no mod for this available.

I just straight-up yanked the file from this place: Age of Kings Heaven - The Blacksmith :: Immobile Units AI GOLD

…and shoved it into the aoe2de ai folder (AoE2DE > resources > _common > ai)