Get URL for uploaded file

Hi all,

first of all, Zoho is so awesome!
I am working on a litte application for a conference. Visitors should be able to download the latest conference programme and the organisers want to upload the updated file. So, on the webpage for visitors, I would put a fixed link to the uploaded programme in Zoho. Now everytime the organizers upload an updated version, I want Zoho to overwrite the old file record with the updated one, and the link should remain the same. Is that possible? It boils down to me not wanting duplicate file records.

Thanks for helping!
ad