Solaris 2.6 restore from tape

Hope someone can help me here...
I've got to restore an E450 with 300MHz cpus which was running Solaris 2.6 from tape. Regrettably the boot drive has failed.
I've access to the first release of Solaris 2.6 CD's and to a set of Solaris 9 CD's.
I remember that different E450 CPUs needed different releases of the 2.6 media set in order to boot correctly.
The tape was written using ufsdump.
So, to my questions?
Will this E450 boot from the Solaris 2.6 CD?
If not, will booting from the Solaris 9 CD be able to ufsrestore and then installboot correctly?
According to the notes I have of the restore process, while booted from the CD I'd issue this command to install the boot block:
installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk /dev/rdsk/c0t0d0s0
but if I'm booted from a Solaris 9 CD would that result in a valid boot block for Solaris 2.6?
Many thanks for any and all assistance.

Please use a Solaris 8 or 9 cd to boot off.