Thought I'd share something I was messing with today:

REGEXP_REPLACE(NS_CONCAT('<a href="<https://system.na1.netsuite.com>'||{file.url}||'"target="_blank">'||{file.name}||'</a>'), ',','<br>')

Will aggregate files associated with a record (in this case I was looking at transactions), and have them available as links so you can open the file in a new window from the saved search results.