Although I've acquired some experience in configuring the myriad of xml files in JBoss, I've never had to set-up the initial configuration from scratch as the jems-installer made it very easy to configure an HA/EJB3.0 server with a secure JMX interface.
The prospect of tinkering with xml files to set-up 4.2 in a high-availability configuration seems daunting.
Will be eagerly awaiting a jems installer or detailed docs.
I am also new to jBPM and I have the same question. Did you get any help or response on the availability of definitive setup documentation?