lucy24 - 8:14 am on Sep 17, 2012 (gmt 0)

My brain hurts.

So does mine. Why do you have the dummy index file at all? Wouldn't it be more practical to switch off auto-indexing

Options -Indexes

for the entire site?

Can't you tell your sitemap script to index only files with certain extensions? If there's nothing in there but images, there's no reason for it to be on the sitemap at all. G### will find the individual images; they're linked from pages.