Got a new, and this time final version. Two changes:
1) Now you can have unlimited ammo for rocket launcher (yeah, I know trainer does that, but still). 2) Included edit for config file to turn gun laser pointer on (your game settings will not be altered in any way).
Not very useful, but being a perfectionist I am, I've decided to finish it all completely. Oh, and also now I made the game screen to show "New Game+" instead of "Continue" (chapter). Means it offers to start a new game, not continue from God knows where. In other words, just a few minor tweaks to make everything proper.