When downloading a mod and editing the mod's iwd file and replacing a character model with a different character model in the character and/or aitype folders, or a weapon with a different weapon, sometimes, when I go to play a specific level, the mission will crash to the menu and say that the character model has not been loaded or the script doesn't recognize it, while a weapon will not appear, instead as just a pink cowbell.
So I'm asking how do I load models and objects from the game into the level so that they will appear. And is there also a step by step tutorial on how to do this so I know where to find the files to edit and to make sure it's all done properly. Along with wanting to load character and weapon models into a level, I would also like to change out vehicles, like replacing a tank with a different tank.
I ask this for both COD WAW and COD 4.