The Java ES 2005Q4 installer is responsible for installing Java 1.5_03 to your system. You will not have to download a later version of Java in order to complete the installation.
Two versions of Directory Server are installed on Solaris 9 systems. When starting or stopping Directory Server you need to specify which version of Directory Server explicitly (for example, 5.2). This task is documented in the Installation Guide.
Also, a Portal Server log issue appears in the Solaris operating system (6267783). If the installer crashes or you interrupt the installation process, you should delete the /tmp/.jes_CaChE directory before restarting the installation process.