Description, title and keywords in integrated Gallery pages

I was wondering how can I change the title, description and keywords in the integrated Gallery pages?

Right now there is no description, the title matches the title of the photo and the keywords are the default I have given with the Meta tags module. I would love to add the long description of the item as a description, and add the item's keywords to the page Meta Tags.

I suppose it could be done by adding a vocabulary in the taxonomy module? But I do not see the option for Gallery 2. How can I do it?

I am using Gallery 2.2.4 core 1.2.0.6 with Drupal 5.7 and PHP 5.2.5