Bow & arrow system

Is there a way to change a hero's attack range from 100 (melee) to 700 (or any range that is not melee) when the hero picks up an item (i.e. a bow)?

Well you could give it trueshot aura when you pick it up but delete the....hmmmm.....ill look into this...

Actually, I just came up with a better idea. If I gave an item (a bow) the ability Firebolt (modded so it can be used every second, has a stun length of 0.01 seconds, and deals 30 damage), then that could work. But I want the hero to use the item every time he attacks an enemy as long as he carries that item. I tried this trigger, but it doesn't seem to work:

ACTIONS
A unit is issued an order targeting an object
CONDITIONS
Issued order is equal to (attack)
Ordered unit has item type of (bow) equal to true
ACTIONS
Hero- Order (ordered unit) to use (item carried by (ordered unit) of type (bow) on (target of issued order)

Any suggestions?

Use "Issue order targeting a unit" instead, use the order "Neutral - Firebolt".
EDIT: But this trigger will only work when the unit issue the attack order Using the attack command, it will not work when you right-click on the unit or when the hero attacks it automatically.Try replacing the hero with a ranged one, or make an orb for it, orbs enable the Hero second attack, just modify it.

use an orb of fire ability whit the range,targets and missile art you want and modify the heroes "attack - 2" , i made it like that.