[Zephyr]

I can't describe all, because some of them are still a puzzle to solve for me.
FinnishTime - as you wrote, keep -1 to make emission active forever
PhiN and PsiN - probably they describe rotation of particles
EmitVelocity - minimum and maximum speed of emitted particles
Wind - put 1000 and check effects - wind is a random speed which moves particles (all in the same direction) - wind direction changes very often, every few seconds
GasResist - how much gas decelerate particles
Rnd - something about randomness of particle emission - I don't know exact effect
EmitTheta - minimum and maximum angle of the emission