So I put the two files into my mw3 folder which I have from steam. I put the two files unanswered launched the game. I played on some servers and ranked up. But my console doesn't work. Its still the rcon. I don't know what's wrong.

Heh, I think you put the / before the command. IW5M doesn't use anything, you just pop up the console and then write in for ex.

cg_fov 90

without anything and press enter.