Selected the b/w John head and pasted it to the movie poster:



That's a down and dirty lesson.

On my tweaked end result, I took out the "O" in psycho and edited the background and cleaned it up with a cloning tool. Don't know if the program that I linked to for you has a clone tool. You can also play with the selection tool and copy paste sections.

quick tweak:



see there is very little DIFFERENCE between the 2 end results, so you don't need special skills or tools to have fun