I've attempted to copy a .dmg of both drive 10 and Norton system works to cds. They look fine -icon is great, I can read and open everything on the cds, but CANT BOOT from them. Using the system preferences to select the startup system clearly shows the respective systems on the discs, and allows me to select them, but when restarting I get the ? , then it starts of the HD. The same result happens when holding the c key down. The disc I am using is a cd-rw (so I can practice till I get it right). The drive is external lacie (new). pbg3. Any ideas/suggestions will be received with gratitude!