the choice of any weapon (IGI 2: Covert Strike)

You can edit the files missions, replacing the weapon you want. I once tried to do so, very funny happened. If you're interested, here are the SFX archive with the changed files (run and point the root directory of the game):
IGI2 Custom Weapon MOD

yeah, I have edited in winhex'e file objects.qwm in each mission, the most you can put three weapons (the third instead of a knife, for example).

Well, it's the specifics of the game. The character has slots for weapons and give him more than these slots will not work.

interestingly, while the physical properties of weapons/ammunition (such as knockdown, accuracy) will not be able to edit? I understand that there is.

coolracer
Can't find this SFX arhivchik. Do you know where he lives now?