The custom search which I recently added only lists URLs but another useful tool is Google image search. It can only be set for 1 domain, but as all my images are within the one domain then it is not a problem. Try the following link, even I had forgotten many of the photos!!

This is the link

The search facilities in the galleries are good, but only work for the gallery you are viewing, so this search will cover all of my sites:-

Alternatively, bookmark this link:-

http://www.google.com/cse/home?cx=009656486145055313875:e8mtz6dqtz0&hl=en