Modding Help Changing projectile frames/image

Ever since the activeitem format was introduced I've had a hard time trying to change appearances of items.
I was wondering, can I change the appearance of the boomerang projectile's frames by changing the .frames directory? And if not, how?

I use Starcheat.

Here's what I have in different parameters to change the image (Yes, I'm changing it to bones.)

Anything that isn't listed hasn't been changed. (I also changed the inventoryIcon parameter to the throwingbone.png frame, but if this isn't the correct way to reference .frames, tell me.)

{
"boomerang": "projectiles/throwable/throwingbones/throwingbone.png"
}

{
"controlForce": 80,
"frames": "projectiles/throwable/throwingbones/throwingbone.frames",
"ignoreTerrain": false,
"knockback": 25,
"pickupDistance": 1.0,
"power": 10,
"snapDistance": 4.0
}

 

I too would like to know the answer to this, I have the exact same question.