Hi, I was wondering if any1 can explain to me how to get this type of backround???

I'm using PS CS2, I was told all i have to do is ctrl + T click on image hold down then drag to the left then drag to the right. But that only doubles the image. Can som1 make a tutorial for this particular stretched backround? TY...Peace...
PS I am using this sig made by Trogdor03 as an example.