LiveJournal uses a standard set of icons for specific pages that are distributed through the /img directory, and handles the configuration for these images in the file: cgi-bin/imageconf.pl. Each image is configured as an associative array in perl, setup with attributes for each file. (FIXME - this needs a lot of work.)

cgi-bin/imageconf.pl is provided. Don't change that. But go ahead and add a new file, imageconf-local.txt beside it in the same format, which imageconf.pl will find and use.