Triggering arc projectile missile movement

well i can't upload the testmap, but here's basically what i have to work with

http://www.freewebs.com/drain_pipe/D...20missiles.w3x

The link is a quick demo of the system i'm wanting to make. I was just wondering if someone knew mathematical equation i could use to be able to modify the launch angle. As of right now, it follows the parabola arc, although the animation is slightly modified but i think it's a good start.

Drain Pipe - the Vector Sys (Partice Sys) is what you wan't to do... but i will not make it better when it's allready exists... (or my TPC sys)
so i don't know but it's a good training to code sys like this.

http://www.wc3jass.com/viewtopic.php?t=2052 Could be a good start.

thx