Damage until Weapons gone in AI strategy ?

[PsychoTechFreak]

Many of my battle simulations have proven this damage ability quite useful. With Damage until W.s gone switched on, the fleets needed less numbers of turns, became less damaged, have won more often. Now I have tried to turn this on for an AI race, does anybody know how to ? Tried several entries like:

Damage Until Weapons Gone := true

But the line will be ignored always. I know it is not used in the default files, but I hope it can be used somehow. Any ideas ?