> root/Planes /Folder with all XXXX real sized linked plane 
> pics. This folder is only used for storage and it is not 
> possible to access the folder without accessing a picture
> (Or else you get the Forbidden error"

Sounds like directory indexes are disabled?  There must be 
pages somewhere which are linking to the images within the 
storage directories.  You will have to mirror from those 
since you won't be able to crawl through directory listings.