desktop wallpaper question

hi.

for some strange reason, all of a sudden all my image
files in the 'my pictures' folder is available in the
selection box as a desktop wallpaper. before this
happened, it only looked at the c:\wINDOWS\web\wallpaper
folder for images (i prefer it this way). i have more
than 100 images in the 'my pictures' folder so windows
shouldn't be looking there for images. how can i revert
back to windows only looking at the
c:\windows\web\wallpaper folder for desktop wallpapers?

kind regards,
thomas

ps/ please don't advise on using sys restore since i
cleared it already. yikes! :P