Yes it does! By dropping photos onto the Offline drop area you are prompted for and Volume, Keywords, and Notes fields (as well as the size the local photo). In Notes you could put something like where you stored the DVD. Then when a photo is viewed the Offline tab displays the Volume (DVD #23 in your example), Keyword, and Notes info. Press the "View Offline" button and if DVD #23 isn't in your drive it will prompt you for it.

The online user guide has a little more info and a screenshot: http://grrsystems.com/DBGallery/help...ff-line_Images

Best Regards,
Glenn Rogers, PMP
Designer of DBGallery: Photo Organiser