I don't quite understand. When I burn a compilation on a DVD-R, using CDBurnerXP, it asks me if I want to leave the disc open or finalize it. I click "Leave the disc open" of course. Well, I thought this way you could add more data later on. It seems I was wrong. I can never add anything else because it says the disc is full. Why??? Must we absolutly need a rewritable DVD to perform this task? I'm not trying to delete or overwrite anything. I only want to add data. It doesn't make any sense if we can't add data and have to use another disc all the time. What a waste!