Description of problem:
f7t4 liveCD fails to fully boot using a DVD-RW as the boot device.

After inialising a number of devices, the kernel hangs for approximately one
minute and then produces the message:

WARNING: Cannot find root file system!

and drops to a root prompt for user to contruct symlink to /dev/root.

dmesg reports finding the DVD-RW device. but when /dev/sdc is manually
created with mknod (blk dev maj:8 min:32) and then mounted with:

mount -t iso9660 /dev/sdc /mnt

the mount fails reporting:

mount: /dev/sdc is not a valid block device

after udev creates /dev/sda{1,2} and /dev/sdb{1 .. 15}. (see dmesg attqched)
there is no /dev/sdc is usable for /dev/root. 

Has DVD driver code been deliberately excluded from the f7t4 liveCD
kernel?

The LiveCD was burnt with a fully functioning and patched fc6
install - no problems with the DVD-RWdevice itself. LiveCD just
won't boot! Tt is my only way of installing (no CD drive attached
to the machine).

Version-Release number of selected component (if applicable):
f7t4 i386 LiveCD

How reproducible:
Always

Steps to Reproduce:
1. Insert LiveCD into DVD-RW (only device which can read the CD)
2. Cols boot machine.
3. vmlinuz and initrd.img loaded, but cannot find root partition.
  
Actual results:
Dumped into a shell with nothing to link /dev/root to. 

Expected results:
A fully booted LiveCD

Additional info:

My smolt output for this machine (from fc6, no hardware has changed):
http://smolt.fedoraproject.org/show?UUID=7ffea52c-f70c-4688-b162-2df17100316b

lsmod output of f7t4 kernel:
Module                  Size  Used by
ext3                  126841  1 
jbd                    61473  1 ext3
mbcache                12741  1 ext3
sd_mod                 24513  2 
ata_generic            12357  0 
ehci_hcd               36185  0 
uhci_hcd               27737  0 
pata_via               15557  1 
sata_via               15685  0 
libata                116965  3 ata_generic,pata_via,sata_via
scsi_mod              141357  2 sd_mod,libata