How to Make Your Own Stationary

This is great, thank you! I've just signed up at a penpal site and will be needing some pretty stationary paper :)

I tried to follow along with this demo of making stationary. I got the point about finding any picture or paper color desired. Now, as a beginner, I find that rest of this demo is too cloudy and unexplained. The woman assumed that everyone knew what she meant by process of print, scan or make as many copies as you want. I really needed to know how you get the print onto the saved stationary. I tried it before and I could print a letter without the stationary or I could print the stationary without the letter. But never together. Also, how in the world do you get the picture onto the desired paper? Again, she assumed we all knew what she was talking about. I would like to her or someone else explain how to make stationary without leaving out the details.