importen questions please anser

in my game i have a training level and it has targets. I have three static targets at first. When all get shot how do i make the next set of walking targets pop up.

Also how do i do actions such as picking up armor. i meen do you set it to colision play IPO or is there a eisier way?

Is there a python scrip to make a charecter atract to another charecter if it sees you. (cant see through walls.

Is there a way to control where and how fast particals go? (not for BGE im not that big of a noob)

Thanx for help and for constructive critisive.

actions should be actions (with armatures), not ipos.

read about properties.