Pursuers and zones of control

[Lysimachos]

Actually the games foresees that units pursuing routed enemies are not affected by the zone of control of other units, which is probably historically sound for cavalry but, in my opinion, not so much for foot units.

Does anyone knows in which file are stored the functions regarding this feature of the game and if it is possible to mod them in order to have that foot units stop their pursuit when entering in a tile ZOCed by an enemy unit?

Any hint or tip is highly welcomed!!