Here's the thing Javelin, the Cheats do things that the Trainer can't, and, if you've put any Improvement points into your stealth, you can't use the trainer, and Lucky me, that was the first thing I put points into.
Of course, since this is a stealth game, it is entirely possible to go thru the entire game without firing your gun so why even worry about how much ammo you get?
I put all my points into Morphine even though it wasn't necessary because of the trainer. I did not have the patience to go all stealth..so I used my gun a fair amount..especially on the last levels. Was a pain in the tookas to keep dying until I figured out some of the guards routines. Boring but interesting game.