Can Search Results Be Sorted by File Name?

Hi.
I use Perlfect Search to index my weekly newsletter (http://www.thecornerforum.org).
I'm wondering if there's any way to sort the results of searches by filename, instead of by the regular ranking system.
For my purposes, I'd rather display the results in chronological order (the filenames are ordered chronologically, e.g. http://www.thecornerforum.org/data/0010010.htm precedes http://www.thecornerforum.org/data/0033000.htm) than by # of times the terms appear in the files, or where in the file they appear.
Is this possible?
(I don't display the "dates" of the files on the search page because I sometimes have to reload the files -- and then the files' dates are no longer the original dates of the newsletter's publication.)
Thank you very much.
- Marc Borbely
Editor, The Corner Forum.