Vighnesh,
There's a number of questions in there.
For reading from a queue, you need an MDB. It can delegate to a stateless session bean once it reads the message.
For the ejb jar xml problem, what error did you get? Posting what problem you have is more likely to yield a solution.
As far as documentation, see
an IBM redbook. They walk through how to create/deploy EJBs to WebSphere using RAD/RSA.