Custom search queries in public facing pages built by the themer

Hello,
I work for a consulting company and am considering purchasing WP File Download to help build the site. Basically, our client needs a document management system and it seems like, on the back end, it has all the features one would would want. My question is that, as a site developer (e.g. themer), is possible to write code in my templates that does a specific query or search, and then I then list the results by iterating over them in my template. For example, say I had a number of PDF files which were tagged a certain, I would like to be able to have a page as a part of the public site that lists links to all PDFs with a certain tag.