How can I add new content in iDVD to a DVD-RW disc which has ample remaining free space? After preparing the new video for burning and clicking on Burn to iDVD, I get a window saying the disc's already recorded and that I can either Erase or Eject.

Question

How can I add new content in iDVD to a DVD-RW disc with a video previously successfully recorded on it? (The disc has ample remaining free space.)
After preparing the new video for burning and clicking in the File menu on Burn to iDVD, I get a window saying the disc's already recorded and that I can either Erase or Eject. My assumption has been that iDVD would automatically find the free space and continue with the new recording from there. I'd be grateful if anyone can shine light on this.

Answer 1

There are, but not with a DVD written as a movie disk. It must be closed when completed, or it doesn't work.
Apple's built in Burn utility also automatically closes any data CD, DVD or Blu-ray disk you burn. Doesn't matter how much space is unused, you can't use it. You'd have to use a more advanced disk creation app, such as Toast Titanium. I then have the option of choosing to write the data as a session:
I can keep doing this until the disk is full. If I've written five sessions to the disk, when I put it in the drive, five CD/DVD icons will appear on the desktop since the OS will treat each session as if they are separate physical disks. At any point you choose Write Disk when writing a group of data, that means you're closing the disk, and again can't add anything after that. So if I had written two sessions, and the third was Write Disk, it's over. I can't put anything else on that disk.