Sun Java Enterprise System 5 Upgrade Guide for Microsoft Windows

Performing a Fresh Install of the Component

Java ES 5 product components are upgraded by performing a fresh install of the components using the Java ES installer. You should install Release 5 in a parallel path and leave the previous version intact. You can reconfigure the product component by migrating the previous version's configuration data to the new installation, or by performing a new configuration, or by doing a combination of both. For some product components a utility is provided for reconfiguring or migrating configuration data for the component.