When mounting Solaris 10 10/08 from a self-burned DVD fails, it is possible to mount the ISO file as a loopback file system.  To do this is quite simple:

# lofiadm -a sol-10-u6-ga1-sparc-dvd.iso /dev/lofi/1
# mount -F hsfs -o ro /dev/lofi/1 /mnt
# cd /mnt
# ls
boot                         License
Copyright                    platform
installer                    Solaris_10
JDS-THIRDPARTYLICENSEREADME