JBoss 4.2.1.GA already ships JBossWS.
You should upgrade the bundle jbossws with the latest one (2.0.1.GA) that features a fully compliant jaxws implementation.
This requires you to donwload jbossws-native-2.0.1.GA archive, inflate it, copy/edit ant.properties specifying your jboss install dir, then run ant deploy-jboss42.
Please also take a look at the documentation (http://labs.jboss.com/jbossws/docs/jaxws_userguide-2.0/index.html)
Is it true that JBoss 4.2.1 GA out of the box ships with jbossws-1.2.1.GA and NOT jbossws2.0.1 GA
Yes. JBoss 4.2.1 GA comes with jbossws-1.2.1.GA.