i could, or you could read the only other thread in the cs section, or you could google it, or you could ask pretty much anyone who plays computer games.
Spraying takes actual skill in 1.6. You can't be walking forward holding down the fire button in the general direction of the guys head and hs him without incredible luck. Most likely the guy will take a second to aim and make a crater in your face if you run at him spraying. In 1.6 you have to aim the cursor way under the guy to spray him accurately, and it's different for every gun and varries ridiculously by distance. It's an acquired skill in 1.6, something to work on and get good at, not an effective strategy for the "what button is reload" guy.
Do NOT get the xbox version. This is not an xbox game, if you're going to get any good at it go for pc version. There's no hotkeys on the xbox, you'll get slaughtered by the guys on pc. I'm assuming pc and xbox gamers can play together, like shadowrun. If not, it doesn't really matter, only that there wont be as much room for improvement on the xbox.