I managed to do it. It really is simple and although I know a fair bit about web services, I guess the fact I had to ask a question with such a simple answer highlights how little I know about JBoss!!!
Anyway, for those of you who are interested:
Take your axis directory from Tomcat (along with all its subdirectories including all of your deployed and registered services) and copy it to the deploy directory of the JBoss server you are running but rename it to axis.war in the process.
You can access your services at: http://localhost:8080/axis/
PS: The axis directory in Tomcat is obviously the one under: TOMCAT_HOME\webapps