I'm not sure what you mean but this may be close(?):
Displaying Wallpapers Better
In 'Display Properties' the options available only enable you to centre or tile a background image. By editing the Registry you can position the image wherever you like.
- Locate the following key in the registry:
- Create two string values called 'Wallpaperoriginx' and 'Wallpaperoriginy'.
- The 'x' string is the horizontal position and 'y' is vertical and the values for each are measured in pixels.
Taken from click here(3).htm. G