Ok, I've been Downloading Effects like the Laser, Goliath Rockets, and then importing them to the W3 Editor. I put them both in the Projectile Art box, but:
Laser - The Laser only appears when the attack impacts the enemy, not while it's traveling to the enemy, so it looks basically just like a blue line through the enemy I'm attacking.
Goliath Rockets - Instead of the Rockets shooting out of my unit, they shoot out behind the enemy, opposite of my unit, then towards him (The model should be shooting out of the unit, and then towards the enemy, not shooting from nothing behind the enemy)
Is it something wrong with the models, or am I doing something wrong? I'm new at this btw.