I haven't checked the HornetQ JBoss AS integration guide for AS5, so I don't exactly know what the requirements of that .rar file are. I'll move this to HornetQ forum since they might be able to answer this.
'm not sure I understand what it means. Does that mean that when we run the integration process, that the default jms-ra.ra is replaced by a version suitable for HornetQ ? If not, can someone please help me understand what steps are need to build a new jms-ra.rar for HornetQ ?
You could manually install the HornetQ's resource adapter with a different name, but on that case you would need to set the adapter's name on each MDB deployed through XML or some annotation.