Lightbox for Drupal attachments

I would like to use Lightbox to display or open attachments (files and images) that are attached to forum posts, comments and nodes(content types). Just the standard Drupal attachments such as the ones used here on Drupal.org.
I did get extlink to open them in a new window, but lightbox is so cool,, I just think it would be so much better and more professional.
I did read the issue que here and have seen a similar request, but it was for all images.. I have read the documentation, but it's a little over my head and there are so many settings I am a little lost, so now I am bothering people with my request.
Thank you very much for help that you can provide.. I will use the answers to help others in the future..