HornetQ is integrated into JBoss AS 7 as a "subsystem." For OpenMQ to get the same level of integration as HornetQ a subsystem would need to be written for it as well. Otherwise, you'd have to find some other integration point (e.g. the ActiveMQ JCA RA can start a broker). I'm not familiar enough with OpenMQ to know if there is a way to do this already.
Out of curiosity, is there a specific reason you wish to use OpenMQ instead of HornetQ?
Mylos, do you solve the problem?
I got the same...