When creating a new JBoss Inc server runtime, the wizard's fields should be:
Name (unique identifier)
The Configuration field should be a list viewer that changes and automatically fills up once a home directory is set. It does nto assume anything about a default configuration. It only takes whatever folders are under the server folder and assumes each one is a configuration.
If you do not see a viewer for "configuration" where you can set the configuration, you are not creating the right type of server.
If you are not creating a server from "JBoss Inc", but rather "JBoss", then you are creating the wrong server.