To beat this you must restart the level, I only turned on infinite health and it worked fine. I have a feeling the infinite ammo, no reload, infinite grenades, cause it to mess up. This was the only way I got it to work, hope it works for you guys, I wanted to beat it without downloading a savegame.
the only option I was using was the infinite health, nothing else, and I wasn't able to call the airstrikes, this is with 1.5 trainer. You sure it is supposed to still work?