Trample message is there for debugging purposes, to be sure when the unit is trampled. Every trigger has them to see if they are all running.
But do you want to basically do the c&c tank infantry crushing system? Since what I tried to achieve was to simulate the trample effect from bfme2 and rise of legends. Hence no extra damage was added, because you already disable infantry this way, but it shouldn't be hard to add some. However it still contains leaks, so it'll need some cleaning first, the main problem is that it uses death animation, which has some undesirable effects, such as blood and death sound.