Adding content to an already created DVD depends on 1 setting: Multi-Session Disc. A multi-session disc allows you to burn it again while keeping the old content and adding more content until it's full. If the Pinnacle Instant DVD Recorder recommends wiping the DVD, then your DVD is actually a rewritable that can be erased over and over again. Simply copy the content first, erase it, and add your original content along with the new one. If the DVD is Single-Session, and it's not a rewritable one, then adding content won't be possible.