Do you have to possibly add media one by one through the interface? Such as the add media tab/add file ? Instead of just loading the .dba files, I would load those up, ten at the same time add each individual file you would like to include in the media. I noticed you tried this already. But have all your .dba files, as well as media files in one folder, not all over the place. Then save the project, and source to that same folder.
rem allow user create game with one click
rem create graphics, sound, scripts, models, with one click
rem slap user in face if game choice is mmo