OS_LDAP upgrading

Hi All,

We are going to upgrading Solaris-5.8 to Solaris 5.10, as well as LDAP 5.1 service pack-3 to LDAP 5.1 service pack-4, So I'm requesting to all what is the best way to upgrade Solaris-5.8, LDAP 5.1 service pack-3 to LDAP 5.1 service pack-4 in solaris-5.10,
As per my knowledge there where 2 way to upgrade one is fresh installation and migration,

Please advice me which is the best approach to do LDAP upgrading activity and provide me configuration steps.

Check this out first

Solaris 10 11/06 Installation Guide: Planning for Installation and Upgrade - Sun Microsystems