Not to hi-jack this thread, but thanks for the info.
I tried 3 kill detectors myself (!alive, not (alive unitname), getdammage unitname == 1.0) and !alive seemed to be the perfect one.
I used the getdammage one before and I had to shoot another bullet in the enemy's body to make sure the trigger actually got activated
I agree, the getdammage is more useful if you use it for, let's say, damaged units. I use the command to make units scream for medics..
repeating trigger (unit might heal!)
getdammage unitname > .2 (around that area, .3 could be fine too)
unitname sidechat "ouchie."
The possibilities