The kernel sources are just standard kernel sources and must have Speakup patched in to make a new kernel with Speakup. The README in the same directory as the ISO mentions what is missing from the install CD. As I said, I suspect they will have to go to two disks for installation very soon. Redhat is up to 3 already, and I don't know how many are in Debian. It's just a fact of life. Even Linux software keeps growing in size over time.