search in the [MOD] Photo Preview Hack
$t_template .= get_thumbnail_small_code($preview_row[$image_preview[$i]]['image_media_file'], $preview_row[$image_preview[$i]]['image_thumb_file'], $preview_row[$image_preview[$i]]['image_id'], $preview_row[$image_preview[$i]]['cat_id'], format_text(trim($preview_row[$image_preview[$i]]['image_name']), 2), $mode, 1);
and replace:
$t_template .= get_thumbnail_code($preview_row[$image_preview[$i]]['image_media_file'], $preview_row[$image_preview[$i]]['image_thumb_file'], $preview_row[$image_preview[$i]]['image_id'], $preview_row[$image_preview[$i]]['cat_id'], format_text(trim($preview_row[$image_preview[$i]]['image_name']), 2), $mode, 1);