This is actually a follow up to a previous question of mine. It deals with the feature of the combat rules that destroys an entire stack of units (no matter how large) by a single unit as long as the single unit can kill the strongest unit in the stack. Why is this unrealistic? Well, because its unrealistic for a stack of 20 horsemen getting slaughtered by a single catapult. Or a fleet full of non-veteran battleships getting destroyed by a single veteran battleship. As much as some players hate stacking, this is just a deal breaker for me. Other methods to prevent stacking would be to inflict a little collateral damage on the stacked units like Civ 4 does.
So here is my question: Is it possible to incorporate such a change by modifying the ruleset file?