How can I configure the wallpaper to be displayed somewhere other than the center of the screen?

A. A. It is possible to configure NT to display a wallpaper anywhere on the screen, however you have to manually update the registry

Start the registry editor (regedt32.exe)
Move to HKEY_CURRENT_USER\Control Panel\Desktop
From the Edit menu, select Add Value
Enter a name of WallpaperOriginX with a type of REG_SZ and click OK, you will then be prompted for a value, this is the number of pixels the left hand side of the image will be from the left side of the screen
Next select Add Value again from the Edit menu and this time the name WallpaperOriginY, click OK and enter the number of pixels the top of the image should be from the top of the screen
Logoff and on to see the change take effect