Sun JavaTM System Application Server Enterprise Edition 8.1 2005Q2 Update 2 is the correct notation. The notation Sun JavaTMSystem Application Server Enterprise Edition 8.1 2005Q4 was in error.
The installer prompts you for the “server name” for the Application Server. However, the installer uses the actual host name of the machine regardless of what you input in the text field.
Solution If the server name is different from the server’s host name, become superuser and type the following in the domain directory of interest (the “server root” directory):
# find . -type f -exec grep -l $HOSTNAME {} \\ ;
Then, change the file contents appropriately.