This page demonstrates the incorporation of the thumbnail captions from the page into the Lightbox caption.

(:thumbgallery Lightbox rel=lightbox cols=2:)
Atlantis_Docked_to_Mir.jpg | The Atlantis space shuttle docked to Mir
Columbia.sts-1.01.jpg | Columbia space shuttle
Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg | The NGC1300 galaxy
ISS_Aug2005.jpg | The International Space Station
Atlantis_Docked_to_Mir.jpg: 728x640, 72k (2009-02-13 12:30)
The Atlantis space shuttle docked to Mir
Columbia.sts-1.01.jpg: 800x640, 138k (2009-02-13 12:30)
Columbia space shuttle
Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg: 800x456, 56k (2009-02-13 12:30)
The NGC1300 galaxy
ISS_Aug2005.jpg: 800x541, 124k (2009-02-13 12:30)
The International Space Station

You need at least the Thumblist version 20080821 to make it work, and to add the following code to your config.php:

 $ThumbList['_tmpl']['awrap'] = "<a href='?L'
 class='thumblink' title='?4' %2\$s>%1\$s</a> ";