only thing i can think of is using what Lord Vexorian said, but change the heros attack to 'missle' at a melee range '128'. see if the spells work then.
I know this from experiance, any arrow ability cannot be edited for melee use. The only way your gonna get this ability to work is by making it a trigger ability. I can help you with that, if you want. Just post reply if you need the help :)
I think black arrow works with melee, but that's all. As for the others, I think they add the damage, but they don't add their effects like slow from frost arrow. Converting the unit to a ranged unit with melee range works, but then the unit is not affected by thorns and similar stuff.
ok, azhag, that would be nice if u could do that :D and uh as for incinerate...when a meele hero uses it, it brings him dmg to 0 and he does no dmg at all but shows the affects of incinerate...its weird...
ok, azhag, that would be nice if u could do that :D and uh as for incinerate...when a meele hero uses it, it brings him dmg to 0 and he does no dmg at all but shows the affects of incinerate...its weird...