Hmmm Seems the trainer bug out at bosses, make them invincible or with the wyland dude in marine campain, shoot in head and i still die. Somebody know wats up?
I get exactly the same issue. the trainer works a charm but bosses are invincible too. e.g. Elite Predator and Weyland in the Marine missions. Switching off the trainer/not loading the trainer after reloading the game doesn't help either.
[Edited by betpet, 3/7/2010 9:10:01 AM]