where to put rel=”lightbox”

fortunately i have not had any problems uploading images, just showing them. more being able to style them than show them. i use a modded Hemingway theme and if i make a gallery without any text in it to begin the post then while that post is on the front page it shows the css code. i looked around and it looked like the place to go was “media.php”. found it and the code was near the end. took the css code adn moved it to my main style sheet and all good to go.

so i imagine if i would like to change the way the anchor tag is built this would be the place to go? i am not great at php so i don’t know where i can add the ‘rel=”lightbox”‘ to activate lightbox. anyone got any ideas?

then the second question i would have would be: is it possible to have a different sized thumbnail show up on the main page? sort of like how ma.tt has his where one thumbnail shows up on the front page and you see the rest once you go to the single post page. ideas? thanks