AoE 'Doom' & Infection spreading

I'm trying to create an area-of-effect psuedo-doom spell, which can only target non-hero organic units, 'dooming' them to turn into a special zombie unit upon death. The second part of the ability, however, is that I want said zombies to be able to inflict said infection onto non-hero organic units when they strike them, thus spreading the infection.

I have tried using a variation on Force of Nature to turn an area of units into zombies, but it seems hard-coded to only be able to target trees. I have tried giving a variation of the doom ability an area of effect, but it will still only target one unit. What is the best way to make this work? Also, is it possible to add data fields to spells? It's damned limiting to have to use roughly the same framework as existing skills for this stuff.

Thanks for your help...

This is such a cool idea that I think I'll make it for you, if you want.

Only question- do you want the summoned zombies to be controllable by the player casting the spell, or do you want them to be randomly wandering neutral hostiles (which could also be done but would need a trigger)?

What I did right now is set a trigger to make the units controlled by an AI player, who then picks it up in their normal AI triggers.

I'm having a really hard time with the zombie infection bit too-- tried for a low-range free-to-cast black arrow on the zombies, with summoned unit of said zombies, but it doesn't work for me.

Just give the zombies a modified orb of slow that can cast doom. That way, they will spread the infection.

How can I go about giving Doom an AoE circle for targetting?I am having difficulty getting the zombies with the black arrow / orb ability to use the ability-- I used the generic one, just changing the summoned unit, and they don't summon anything.

you pick every unit in the range of the target point, then you create a caster at the position of the picked unit, give that caster the doom ability without mana and cooldown, order the caster to cast doom on the picked unit, add an expiration timer to the caster or

Use my caster system

*coughshamelessplugcough*

any ways, you really should use vex'orian's caster system, look in his sig for a link

and about the damn limiting thing, it always has been, the only way to really make "new" spells is through triggers