If you're simply trying to use a web-based tool to copy images to your server, you can run
curl from your apache/php/mysql server against the
lighttpd server where the images live.
On the other hand, if you're trying to do something more production-y, you might need to clarify your question. Do you have a fat pipe between web/app server and storage server, and so want to cache from the front end? Do you have a post-production system pushing to the storage server, and want to publish new content out to a production site? Do you have too much image data to stage on your web/app front end, and need to do some tricky caching?