Note:
To avoid reload, just modify value of "current magazine" to be bigger than 1 + freeze
For invulnerability, just modify value of "health" to e.g. 9999 + freeze
How to use this cheat table?
Install Cheat Engine
Double-click the .CT file in order to open it.
Click the PC icon in Cheat Engine in order to select the game process.
Keep the list.
Activate the trainer options by checking boxes or setting values from 0 to 1