Convert your ancient Exhibit 1.1b galleries to modern WordPress attachments / galleries
You need to have Exhibit running for the conversion to work. The original Exhibit wont run on WordPress 2.1 or newer though, so I included a patched version of Exhibit 1.1b, enabled to run on WordPress up to 2.6.3. (use your original configuration files, or remember to edit the included ones)
Exhibit was the only proper solution back in those days - way before WordPress even had file uploading capabilities. With only small modifications it has kept on working over ten major wordpress releases!
But all plugins are bound to become outdated. The only sane long term solution is to use the core WP functions. Get yourself a plugin that is built on top of those, and you'll always have a safe fallback.