How do you make special effects big??!!

I have looked everywhere and can not find out how to make special effects bigger for my map! err cinematic.:nono:

Create a cutom unit with the model of the effect. Then change the unit size. When you want that effect just create the unit at the location you want. Give it a life timer or remove it when you dont want it anymore.

Is that the only way to do this? I was just wondering about it earlier, myself.. but I don't want to make even more custom units if it isn't necessary. Is there any other method?

Not realy. The only other thing you can do is when you use hidden caster units that use missile attacks. If you make them larger their missle effect will be larger. As long as scale missile to unit size is turned on. This wont work for most effects tho.