Okay, i have next trouble... As emitter is far from camera, it can be postioned behind the models... so, sometimes i dont see particles at all

In addition, it's looking like non-optimized to translate particle coordinates from 3d(emitter) to screen, then calculate new position in 3d, and then translate into screen coordinatees again...

I'd be REALLY happy, if you (please-please-please) add posibility of rendering particles right on the screen, like entittes:
ENTITY* shotgun_onscreen =
{
type = "shotgun.mdl";
layer = 2; // display above view entities with layer 1
flags2 = SHOW; // lite-C only:
x = 100; // place 100 quants ahead of the view
y = -50; // 50 to the right
z = 0; // and center vertically
}