Thx (oder Danke) Jochen,
since I've been using the older JBoss, it was enough to replace catalina folders :)
But after reading your message I figured I could turn to JBoss 3.0.2 as well!
Have to replace my comment from before
IT'S NOT AS EASY AS COPYING THE FOLDER!
But I haven't figured out the problem yet ;)
Tomcat 4.1 uses JMX
The embedded catalina used in JBoss will need to be
started with a reference to JBoss's MBeanServer.
Not sure what other changes maybe required to the