[Plugin: HeadSpace2 SEO] Combating Duplicate Meta Descriptions

i use ‘headspace2’ for seo. i use a custom images.php for my attachment gallery, like this one https://wp.me/a1dfs6-E7 , so that page is considered a post rather than an attachment page. ‘headspace’ allows you to setup custom attachment page titles and meta descriptions, but that page is not considered an attachment. the problem is that i have too many duplicate meta titles and descriptions because of this. i was wondering if there was a way to get the name of the file to somehow put in my meta description so i don’t have duplicates