Your Tomcat applications are just clients to the JBoss server. So you will need the JNDI lookup and EJB support classes (jbossall-client.jar will be the primary one). Put it in shared/lib of your Tomcat distribution. Some people have come to grief with trying it in the WAR or putting it elsewhere in Tomcat. I know it definitely works in the shared/lib directory. Don't dump all the jars from the client directory of your JBoss distribution into Tomcat. Some are libraries you probably won't use and some contain classes held in multiple jars - jbossall-client.jar has the main bundle you normally need - supplement it selectively if your EJB call complains it needs another class.
You then call EJBs in JBoss as per tutorials and examples for standard remote clients to JBoss EJBs. There should be some examples of code in this forum if you look.
Hope that helps.
Thanks for your reply. I will try it and get back to you incase of any issues.
thanks a lot