[eluser]webthink[/eluser]
Hi abmcr,
Upload is a bit tricky because there isn't just a form->db interface to worry about. You've also got to handle the server side storage/processing of the file.
What you could do is handle all of that within one of the _set_additional_values_[TABLE_NAME]_[ACTION] functions which are called automatically. That way you do everything you need to do with the physical files according to your own set up. and then set $additional_values ['file_path'] or whatever you want to be inserted into the db. The fill_db_from_form() library method will automatically check to see if this method exists in your controller and then use whatever values are returned from it to update/insert into the db.