So to use Jboss Portal with JBoss 5.1.0.G.A., I have to use the Gatein version that you suggested.
Otherwise, I have to reverse JBoss from version 5.1.0.G.A. to AS 4.2.3.
Do I loose any major functionality if I were to go back to JBoss AS 4.2.3?
Thanks,
Tuan