You don't know how to set up a stationery with Outlook Express ?
I'm going to try to explain to you the handling ...

1. Save the background you've chosen in a folder. For example this one called "stvalentin2.jpg" :

2. Open your Outlook Express (or OE), hit "tools", "options", a new window opens :

3. Hit "compose", "select" (like the image below), a new window opens :

4. Select the stationery in the list and hit "create new", a new window opens, "next" :

5. Go to the folder in which you've saved the stationery you want to use, "ok", the stationary appears in the preview window, choose "vertically" so that the background fills out all the page, hit "next" :

6. Choose the font, its color, its size, hit "next", play with the margins so that you won't write on the left border, hit "next" :

7. Give a name to your stationery, hit "ok" to close all the windows. Now choose to write a new mail, it will have the stationery you are just going to create with the settings you've chosen :

Hope this will help you...