README.txt for ds-builder tool

http://anonsvn.jboss.org/repos/jbossas/branches/JBPAPP_5_1/ds-builder/src/etc/README.txt

Change JBOSS_HOME to EAP_HOME
or
Replace 'JBOSS_HOME/jboss-as/tools/ds-builder' with 'JBOSS_HOME/tools/ds-builder'

JBOSS_HOME is used to point to application server directory – EAP_HOME/jboss-as.
Our scripts in jboss-eap-5.2/jboss-as/bin are using JBOSS_HOME as I described - expecting to point to jboss-as directory.