Enterprise EJB adapter - how to cluster ???? See inside...

Hi. One of our integrations (on ES 5.0.1.) uses an EJB adapter. The EJB adapter is installed on our WebSphere server.
The plan is to cluster our WebSphere servers (active/passive). If one WebSphere server fails, then the second WebSphere server will activate. Both servers will not be active at the same time.

Question: What is the recommended way to cluster the EJB adapter ? If we install the adapter on both WebSphere servers, is there a way to tell both adapters to refer to the same client queue ?
Is there a better approach to clustering adapters ?

Any thoughts ?