If your installation plan calls for high availability for non-Java ES products, follow the instructions here.
Install and configure the non-Java ES product.
For example, install Instant Messaging using the Sun Java Communications Suite 5 Installation Guide.
In the Choose Software Components page of the Java ES installer, select the Sun Cluster agent that supports that product.
For example, select the HA Instant Messaging subcomponent of the Java ES Sun Cluster Agents component.
Install the Sun Cluster agent using the Java ES installer.
Configure the agent following the instructions in the appropriate Sun Cluster data service guide here:
Solaris SPARC platform data services guides are available here: http://docs.sun.com/app/docs/coll/1124.4
Solaris x86 platform data services guides are available here: http://docs.sun.com/app/docs/coll/1125.4
Special Java ES Instructions for current release here: Sun Cluster 3.1 8/05 With Sun Java Enterprise System 5 Special Instructions