i belive mw2 admintool has a ingame console, but dunno if it works anymore, every time i try to ban some1 the game closes.
but a better way is to run your game in windowed mode and then download mw2 maximizer from alteriw at the download section. when u want to the console just press windows key, and u dont need to wait for the game to minimize because its technically already minimized hope u understood because i hardly could understand either