[SandrilaFriman]

I want to know how to start *creating* a mod, not just using mods. I have an idea for some weapon changes that I want to test for myself, but don't know where to start to do such things. Do I use Source SDK echatrandom, or any C++ software, or something else that I'm completely unaware of?

[Bugsy]

Search for something similar that you want to do and use that for guidance. Good chance that someone has already created your idea, or something similar.