Here's my idea how you can do it;
Insert CD/DVD where you've copied your system,unmount it if it's mounted automatically and then create CD/DVD iso image with command;
# dd if=/dev/cdrom of=/tmp/2.6.9-67_Oracle_Linux_Enterprise_4.iso
: read from /dev/cdrom(rawformat)
: write to file; 2.6.9-67_Oracle_Linux_Enterprise_4.iso i.e. create an ISO image.Then you can burn that iso image and use it for hard disk installations.