Well.. I'm not quite sure exactly what ya mean by that, though I'm kinda assuming your talking about a multiplayer game? If so.. you might have better response in that forum
But in regards to scoring you can use this little piece of code:
unitname addscore
pointsyou could then make a script with all your scoring options in it .. or make some triggers with different conditions that correspond to different point values
(negative numbers work here too)