Jpeg-files are 800x600pixels.
For use in older operating systems: convert to a bmp-file in any
program (such as paint, thumbs plus, photoshop, etc.). In older
systems the bmp-file should be copied to the windows directory.
panel double click the "display"
icon. In the "background"
tab browse to the file you want to have as wallpaper. You can also
on the current wallpaper and click "properties" to get to the same