PhpBB3 BBCodes

I am referring to the 8 thumbnails, with the headline Prettyphoto forum images. How can I duplicate that? Thanks for your help.

Thanks for the update - the installation on 3.9 was flawless. How do I get attachments already posted to display on the index page as you have it?

Thank you. There is a problem: automod is looking for functions_content.pgp

I get this when uploading the zip file:
Unexpected header, ending loop

and I cannot install the mod. Please advise.