Cfg's are awaesome, you can put lots of stuf in it to help you reduce lag, and, you can make it so it will auto execute when you join a new server.
I'd say do it like this:
Make a text document - name doesn't matter...
Put all in whatever you want, also, you can put binds in, binds helping is as far as i believe typed in a different topic, not gonna explain...
once your done save the file as: "autoexec.cfg"
Keep the "" Marks on, that will make the text file a config file!
Then go to ET, you can host your own server, so you don't have to spam the rest of the server with your binds. Type in console /exec autoexec and then you can test your binds.
Gl with it.
Wolp3d.