Ok. Here's my test to make it look like smoke was coming out the back of an aircraft. (Green smoke...) Once the Mutalisks cloak and start attacking, make the Shuttle move around in the little square. It looks like smoke is coming out form the back. This can be used for some cinematics.
It's horrible.
I'll give you credit for a great imagination, but it doesn't look too realistic having arbiters and mutalisks following and attacking a shuttle. No offence, but people just wouldn't want to see this kind of stuff in a map.
Yea, it is very creative, but turned out horrible, try to get a better effect from it.