BehaviourHLInfectedPack is only class which have possible set waypoints to get at least some control over AI from scripts.
But when try setup Infected with this behaviour, they still stay in CALM state and not change mindstate to alerted or chase.
Please provide some AI documentation (for config.cpp) for class BehaviourHLInfectedPack or at least some example config.
Not sure which way this old mod get his config.cpp: https://github.com/Thurston00/DayZSGZScripts/blob/master/sg/creatures/infected/_infected_base/config.cpp
Is very painful try understand how that works without any documentation or example config.