Use the Application Server file-based installer to install the target application server binaries. You can install in-place (in the same location as your earlier installation) or side-by-side (in a different location). For instructions on how to use the file-based installer, see Sun Java System Application Server 9.1 Update 1 Installation Guide.
After installing the target application server binaries, run the asupgrade command for Upgrading Application Server Configuration, Deployed Applications, and Certificate Databases.