JBoss Central has a "software/update" page which gets its content from a hardcoded URL, set in the org.jboss.tools.central plugin.

The published (current) milestone release URL is 

	http://devstudio.jboss.com/updates/5.0/devstudio-directory.xml

The stable branch (upcoming milestone) URL is

	http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.updatesite/extras/devstudio-directory.xml

The unstable trunk URL is

	http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_trunk.updatesite/extras/devstudio-directory.xml

The same as used for all milestone releases of JBoss Tools; should you want to pull the list of available updates from a NEWER directory file (eg., during a QE cycle when there's a milestone candidate available, but the published milestone site still contains the PREVIOUS milestone), you can do so using a commmandline flag.

Thus, when running JBDS, simply pass in an alternate URL like this:

	./jbdevstudio -vmargs -Djboss.discovery.directory.url=http://www.qa.jboss.com/binaries/RHDS/builds/staging/devstudio-5.0_stable_branch.updatesite/extras/devstudio-directory.xml

Or, you can add the -Djboss.discovery.directory.url flag to your jbdevstudio/studio/jbdevstudio.ini file after the -vmargs line.
