Is there a way to make etheral units attackable?

Is there a way to make etheral units attackable?

I am currently making a map which uses etheral units, i was just wondering, is there a way to make etheral units attackable without changing every units attack type to magic? or is this the only way?

Go into Gameplay Constants under the Advanced menu, click the Custom Gameplay Constants checkbox, then scroll down to Combat - Damage Bonus Table - Ethereal. That lets you change the amount of damage taken from the various types of attacks by units with Ethereal armour; change all the zeroes to something else (1, or 1.66, or whatever you wish).

I just tried doing that, but it says "etheral units can only be hit by spells and magic damage"

Hmm. I am stuck then, but it was worth a try.

Maybe you can change the targets for the attack types with the Gameplay Constants?