Plutonium

Is there a way to edit xp values via the console? like if I wanted to play against bots with double xp how would I do that?

How do you go about editing weapon stats using mod tools? I for the life of me cannot get it to work and have tried many different steps/tutorials. All of the tutorials seem to be a little different and none of them work. Does anyone know how to do this? There is no where online that solidly explains modifying weapon files in zombies.