HELP ME plz cant get this

Question

i wanna make weapons for gunz and put them to it how can i make weapons and put them on to gunz with out deleteing or replacing the origanl iteam like i make a shotgun that does 18 dmg how can i add it to gunz

Answer 1

What program is this for?

Answer 2

Maybe I would try to help you if your question wasn't one big sentence...