Sure. Will have to make sure that you don't have port conflicts such as JNDI (see jboss-service.xml) and web server (see service.xml in tomcat sar).

Easiest thing to do is take server/default directory (or all, depending on what services you are using) and make a copy of it using a new name (i.e. server/default2). Then change the ports for the services you are using in their xml files. Then start both (run -c default and run -c default2)

see bindings :

1 - in conf/jboss-service.xml activate the binding MBean

2 - in docs/example/binding-manager there's the sample-bindings.xml you point to in the MBean configuration

http://www.jboss.org/wiki/Wiki.jsp?page=Setmultipleinstances

Some guidance there.