A Scenario question regarding Bookends attachments

Hi there. I use Bookends for my bibliographic needs. Many of my entries have PDF’s attached to them, which are housed in one folder in my documents. Is it possible for DT to catalogue these without importing it all into the database (the PDF’s come out to a lot of megs) and for DT to keep itself ‘updated’ when PDF’s are added to the Bookends attachment folder?

Thanks a bunch, and if anyone has any suggestions/tips on how to better integrate Bookends/Mellel use with DT, please let me know.