When you install the J2EE configuration, you have the following options:

New installation--multiserver configuration

Use this option to install a copy of JRun 4 with ColdFusion deployed and configured as an enterprise application in a JRun server. For installation details, see Installing ColdFusion using the multiserver configuration. Adobe recommends this configuration option if JRun or another J2EE application server is not already installed on the computer and you plan to use JRun 4 instead of another J2EE application server.

New installation--create an EAR or WAR file

Use this option if you already have a J2EE application server running on the computer. The installation wizard creates an EAR file or two WAR files, which you deploy using J2EE application-server-specific tools or utilities. For installation details, see Installing an EAR file or WAR files.