Using entity I discoverd the efficient and best way to make visible projectiles.
With no duplication, meta swaps or dependancy swaps. Thus only taking about 30 seconds (for the average user) and your weapons keep their respective dependencies and properties, making it the proper way of doing it!
Now the way I got to this was...
xxchancexx said make visible projectiles for the maps that I was making for the map pack. I went to look at the tut and I found it a rediculusly long process to do. It also breaks indents and makes your maps size bigger for nothing.
So I went on a rampage to figure out why the rocket and plasma pistol have visible projectiles already. Without even looking at anything I thought:
Hey you can see the rocket when it flies across the map, it also has a MODELand so does the plasma pistol bullet, and the other weapon's bullets don't.
So I went to work on this and came up with a method of making visible projectiles, in other words: MAKE THE WEAPON SHOOT A MODEL.
Finaly after testing with darkblood (thanks a bunch man) as my ginypig of a non modder, and seeing how amazed he was that I did it so fast. I made a video for the world to woreship speed and proper work. (sorry, insolence was kick ass back in the day!)
Here it is:
Visible projectiles video

I havent tested it but Im 100% sure that it works by using the rocket with weapons that run on batteries.