ISP CHAP AUTHENTICATION PROBLEM solaris 2.7 x86

1. can I install ab Solaris 2.5 to Solaris 2.7 x86

Hello all
I have distib CD : Solaris 2.5 with System Administrator's Answerbook /x86
Edition
I have Solaris 2.7 intel
I want install System Administrator's Answerbook to Solaris 2.7
but when I type: pkgadd -d /cdrom/cdrom0 (or any dir in cd like
/cdrom/cdrom0/sysadmab/common)
That error occured: no packages were found in

can I install ab Solaris 2.5 to Solaris 2.7 x86???

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