I'm not sure this would work, but you can.....
Burn the all of CD's to the DVD, to make the DVD visit;
ftp://people.redhat.com/ckloiber/ and get mkdvdiso.sh or use what you found.
Cavet you will need lots of space for this 3x the size of the 5 CD's, 1x for the ISO images, 1x for the extracted files and 1x for the DVD ISO image.
Copy the boot.iso file from the first CD or the created DVD and burn the boot CD and switch to the DVD or try;
http://linux.simple.be/tools/sbm