Posts like this should probably be in the Clustering/JBoss user forum located at http://www.jboss.org/index.html?module=bb&op=viewforum&f=64...
Your post does not really give much of an indication of what you are trying to do, so it is very hard to come up with much to say in response. A specific question is likely to yield a direct answer.
You should probably review the information provided in the links below before posting about clustering, as it will give you some context for your particular use case/question.
The JBoss Clustering Wiki:
The JBoss 3 Clustering Documentation: