Fake Your Name In MW3

Hello

I was wondering if there is a way you can fake your name on MW3.
I got this program, but that only change my name from XXXXXXX to .
I want to change it to something i choose.
Is that possible?

I once saw a video somewhere , that you could use the program cheat engine, but i cant find the video.
Anyone know it?

Thank you

Something like my tutorial?