Trainer seems to work great so far, only two minor issues.
First one is that certain weapons don't like the no-reload (Num4) option which either causes them to only have one bullet and then you reload after each shot, (The "SMG" - called bastard - is one of those.) or it causes the weapon to be constantly reloaded. (The second shotgun you can buy at the market station is one of these weapons, player will continuously put shells into the weapon.)
Turning off the option solves this and most other weapons do seem to work fine.
The second issue is that the no-recoil option (Num9)causes many of the weapons to become silent when fired but that's not much of a problem, again disabling the option solves this.
No other problems with the trainer in either game so far, switching levels works as well, no crashes.
(There is a slight chance the game will crash if you have god-mode enabled - not a issue with the trainer, something with the game I think - and trigger a trap which is meant to kill you, just be careful to avoid tripwires and such.)
[Edited by LordJB, 8/27/2014 9:09:51 AM]
[Edited by LordJB, 8/27/2014 9:10:49 AM]
for most shotgun weapons, use the LEFT BUTTON to fire. the RIGHT BUTTON is basically FIRE ALL BARRELS button.
best,
cal