You can install the Solaris Live Upgrade packages by using following:
The pkgadd command. The Solaris Live Upgrade packages are SUNWlur and SUNWluu, and these packages must be installed in that order.
An installer on the Solaris DVD, the Solaris Software 2 of 2 CD, or a net installation image.
If you are running the Solaris 2.6, Solaris 7, or Solaris 8 release, you might not be able to run the Solaris Live Upgrade installer. These releases do not contain the set of patches needed to run the JavaTM 2 runtime environment. You must have the Java 2 runtime environment recommended patch cluster to run the Solaris Live Upgrade installer and install the packages. To install the Solaris Live Upgrade packages, use the pkgadd command. Or, install the Java 2 runtime environment recommended patch cluster that is available on http://sunsolve.sun.com.
For instructions on installing the Solaris Live Upgrade software, see Installing Solaris Live Upgrade.