I've compiled the code for you since you have no idea what to do!
NOTE - This is not an aimbot! It's justs shows a crosshair and quickscopes for you when your middle-click. You cannot be VAC banned for this!
1. Run the program as administrator if running Windows 7 or Vista.
2. Start Modern Warfare 2
3. Make sure your game is in windowed mode. If not, press Alt+Enter and make sure the game window is exactly in the midddle. An easy way to do this is g into a private game, choose a gun with a small crosshair like a UMP45 and position the windows in the correct place so that both crosshairs (the X shaped one and the + shaped one) are aligned correctly. After that, leave the game and join a public match.
3. Choose a sniper class WITH Sleight of Hand Pro and just middle-click to enjoy.
Make sure you set your ADS (Aim Down Sight) to Right-click, Shoot to Left-click and Breath to Shift.
There are a few detections because some anti-viruses flag AutoHotkey programs as viruses. (Note that it says Trojan/AutoHK.ge and not something else!)
EDIT - Just realised that the crosshair works but the autoshoot doesn't work? LOL. I tried removing the crosshair segment but its not working? I probably fail at AHK.
EDIT 2 - Never mind, it's works. It's middle-click not right-click!
EDIT 3 - Fixed the program and added new virus scans.
EDIt 4 - Removed attachment. Please check post #29 on page 3