I cannot speak for KoolMoves, as never heard of let alone used, but if its any help the as2 method would be.
Test 1 being the Car
Test 2 being a holder for where the image is being called in

Code:
test1.onRollOver = function(){
	test2.loadMovie("images/Lightbox_example.jpg");
}
test1.onRollOut = function(){
	test2.unloadMovie();
}
CFR
If all is good mark resolved