I'll say it. I'm not ashamed of it. I suck at modding. My skill level resides in Hammer for Half-Life/Half-Life 2/CSS, and is pretty low at that. I'm sure this is easy to do though, so my question is: how the crap do I mod all the weapons out with different ammo capacities, damage levels, explosive...-ness, spray size, shot delay, etc.? It must be pretty easy to do. I have the SDK, I just don't know what files do what and/or how to do anything to them.
my best suggestion would be to just browse around and play with different files.. that's the best way to figure anything out, in my personal opinion