nice weapons, how do i make my own?

I've played elimination tournament a few times and I enjoyed the weapons.
I want to make my own maps with similar weapons, so I opened up the map in world editor to take a look. All the ability and item data was intact, but the triggers were missing. A full tutorial on how to create all the weapons would be appreciated. Also, link me to any tutorials or forums that already address this issue, and bake me an apple pie.

Heres an link of the system they used http://www.wc3campaigns.net/showthread.php?t=87027

-Av3n

Everything in ET uses the same physics system; it's not just the weapons. You'd have to make your own physics system (vector system) :-)

Actualy the vector system Av3n linked to is just a subsystem, the main engine for handling projectiles is the particle system.

...which was created by iNfraNe, if i'm not mistaken.