the control for this mechanism is a simple true/false switch
canOnlyTargetStructures TRUE
True, then only structures
False, then attackes everything structures, caps, frigates, etc.
edit: ANTIMODULE thing is for the type of armor it effects the best
DamagePercentBonus:ANTIMODULE:CapitalShip 1.0
DamagePercentBonus:ANTIMODULE:VeryLight 0.25
DamagePercentBonus:ANTIMODULE:Light 0.25
DamagePercentBonus:ANTIMODULE:Medium 0.5
DamagePercentBonus:ANTIMODULE:Heavy 0.75
DamagePercentBonus:ANTIMODULE:VeryHeavy 1.0
DamagePercentBonus:ANTIMODULE:Module 2.0
DamagePercentBonus:ANTIMODULE:Pirate 0.30